初三英语每日一练--if在宾语从句和条件状语从句中的区别
状从if和宾从if 区别
If 状从----如果
If we ____(have)the party, half the class will not go to it . If it ____(rain)next week,we will have a trip. He can go to senior high school ,if he ___(work)hard. What will happen if he ___(make)a lot of money.
If 宾从—是否
The teacher asked if they ___(be) ready for the final examination. I wonder if it ____(rain)next week. I don’t know if he____(arrive)at Kenli. Can you tell me if my father _____(stay )at home tomorrhe asked me，“ Are you going to play football tomorrow? ”
She asked me _____I am going to play football tomorrow?
if
1、从句的位置： 、从句的位置：
宾语从句只能在主句的后面；条件状语从句 可以放在主句的后面，也可以放在主句的前 面。 I don‘t know if he will come. (宾语从句） I will let you know if he comes. (条件状语 从句）
if
2、词义： 、词义：
if 在宾语从句中汉语意思是“是否”，可以 用whether替换。 在条件状语从句中汉语意思是“如果”，不 可以用whether替换。 I asked me if I go to the party. If it doesn’t rain ,we will go to have the picnic.
中考If引导的两种从句(宾语从句和条件状语从句) (4)
【例句】
我不知道他今天是否会来。
[误]I don’t know that if(whether) he will come here today.
[正]I don’t know if(whether) he will come here today.
如果明天下雨，我们就不去长城了。
（3）在if引导的条件状语从句中，当主句是一般将来时时，不能使用be going to结构，而要用will。
【例句】
I’ll help you with your English if I am free tomorrow.
如果明天我有空，我会帮助你学英语。
（4）在if引导的条件状语从句中不能使用some，而要用any。
他走过来看看猫是否出了毛病。
[误]He came to see what if (whether) there was anything wrong with his cat .
[正]He came to see if (whether) there was anything wrong with his cat .
如果你想去溜冰，穿上暖和的衣服。
如果主句是一般将来时，从句必须用一般现在时。
【例句】
You will be late for school if you get up late.
如果你起晚了，你上学将迟到。
If it rains tomorrow, we won’t go to the Great Wall.
我想知道它是不是好消息。
在介词后，只能用whether：
【例句】
His father is worried about whether he loseshis work.
If引导的两种从句(宾语从句和条件状语从句)
重点、难点1. 含有if引导的条件状语从句的复合句中主从句的时态。
2. If引导的宾语从句与条件状语从句的区别。
考情分析通常在单项选择、完形填空或补全、完成句子等题型中考查，分值约3—4分。
知能提升（一）知识讲解【认知讲解】I. if引导的宾语从句if 引导宾语从句时，意思为：是否，从句的时态通常要和主句保持一致。
【例句】I want to know if he lives there. 我想知道他是否住在那儿。
He asked me if I could help him. 他问我是否能帮他。
【考查点】if、whether引导的宾语从句的区别1. if或whether引导宾语从句时，作“是否”讲，常放在动词ask、see、say、know和find out等后面。
一般情况下，两者常可换用，在口语中多用if。
【例句】Nobody knows whether / if it will rain tomorrow.没有人知道明天是否下雨。
Lucy asked whether / if they had a cotton sweater.露西问他们是否有棉制的毛衣。
2. if或whether引导宾语从句时，要注意三个方面，即连词、语序和时态。
if或whether既不能和that 或其他连词（副词）同时使用，也不能省略。
【例句】我不知道他今天是否会来。
[误] I don’t know that if(whether) he will come here today.[正] I don’t know if(whether) he will come here today.他走过来看看猫是否出了毛病。
[误] He came to see what if (whether) there was anything wrong with his cat .[正] He came to see if (whether) there was anything wrong with his cat .if或whether引导宾语从句时，虽具有疑问的意义，但其从句应用陈述句的语序。
if条件状语从句与宾语从句
我不知道他是否会帮助我。
【例1】If your friend ______，I'll tell you.
A．come B．willcome
C．comesD．arecoming
【例2】If you go to college，you ______a good education.
A．will getB．getC．getsD．got
【例3】I want to know if they______ tomorrow.
A．comeB．willcome
C．comesD．came
【例4】Take enough exercise，______you'll be in goodheaቤተ መጻሕፍቲ ባይዱh.
3．if引导的条件状语从句和宾语从句的差别：
if引导的条件状语从句
意为“如果……”，其时态遵循“主将从现”规则。
I'll tell you about it if you come.如果你来，我就告诉你关于它的情况。
if引导的宾语从句
意为“是否……”，其时态受主句谓语动词的限制。若主句谓语动词为现在时或将来时，if引导的宾语从句要根据实际情况来恰当使用时态。
A．orB．so
C．butD．and
If引导的两种从句宾语从句和条件状语从句
重点、难点1. 含有if引导的条件状语从句的复合句中主从句的时态;2. If引导的宾语从句与条件状语从句的区别;考情分析通常在单项选择、完形填空或补全、完成句子等题型中考查,分值约3—4分;知能提升一知识讲解认知讲解I. if引导的宾语从句if 引导宾语从句时,意思为：是否,从句的时态通常要和主句保持一致;例句I want to know if he lives there. 我想知道他是否住在那儿;He asked me if I could help him. 他问我是否能帮他;考查点if、whether引导的宾语从句的区别1. if或whether引导宾语从句时,作“是否”讲,常放在动词ask、see、say、know和find out等后面;一般情况下,两者常可换用,在口语中多用if;例句Nobody knows whether / if it will rain tomorrow.没有人知道明天是否下雨;Lucy asked whether / if they had a cotton sweater.露西问他们是否有棉制的毛衣;2. if或whether引导宾语从句时,要注意三个方面,即连词、语序和时态;if或whether既不能和that 或其他连词副词同时使用,也不能省略;例句我不知道他今天是否会来;误I don’t know that ifwhether he will come here today.正I don’t know ifwhether he will come here today.他走过来看看猫是否出了毛病;误 He came to see what if whether there was anything wrong with his cat .正He came to see if whether there was anything wrong with his cat .if或whether引导宾语从句时,虽具有疑问的意义,但其从句应用陈述句的语序;例句Did you know the way to the hospital The old woman asked me.The old woman asked me if / whether I knew the way to the hospital.老妇人问我是否知道去医院的路;if或whether引导的宾语从句应和主句的时态保持一致;即主句为一般现在时,从句用任一种时态；主句为一般过去时,从句则用过去时中的任一种时态;例句I don’t know if whether he has come here.我不知道他是否来过这儿;Tom asked if whether I had read the book.汤姆问我是否看过这本书;3. 只能用whether的情况在动词不定式之前只能用whether：例句I can’t decide whether to stay.我不能决定是否留下;在whether …or not 的固定搭配中：例句I want to know whether it’s good news or not.我想知道它是不是好消息;在介词后,只能用whether：例句His father is worried about whether he loses his work.他的父亲担心他是否会失去工作;用if会引起歧义时：例句Could you tell me if you know the answer这句话有两种意思：“你能告诉我你是否知道答案吗”或“如果你知道答案,请告诉我,好吗”;如用whether则可避免歧义;考题链接I don’t know _________ they could pass the exam or not.A. whyB. ifC. thatD. whether答案：D解题思路：本题考查if与whether的区别,在whether…or not的固定搭配中通常只用whether;II. if引导的条件状语从句1.含义条件状语从句是在复合句中作条件状语的句子;表示假如有从句的动作发生就会有主句的动作发生,条件状语从句常由从属连词if引导;例句You will catch the bus if you get up early.如果你早起的话,就能赶上公共汽车;2. 类别主祈从现：主句是祈使句,从句是由if引导的使用一般现在时的句子;例句If you want to go, please tell me. 如果你想去,请告诉我;Print the photo if you like it.如果你喜欢这照片就把它打印出来;主将从现：指if引导的条件状语从句用一般现在时,主句用一般将来时;例句If it doesn’t rain tomorrow, we’ll go to the Great Wall.如果明天不下雨,我们就会去长城;If you don’t get up early, you will be late for school.如果你不早点起床,你上学就会迟到;3. if引导的条件状语从句用法：1位置if引导的条件状语从句,既可放在主句之前也可放在主句之后;当从句置于主句之前时,常用逗号与主句隔开;例句You will catch the bus if you get up early.=If you get up early, you will catch the bus.如果你早起的话,就能赶上公共汽车;2时态应遵循主、从句时态呼应的原则;当主句是一般现在时包含祈使句和含情态动词can, may, must等的句子,从句也用一般现在时;例句You must see the doctor if you are ill.如果你生病了,你必须去看医生;If you want to go skating, wear warm clothes.如果你想去溜冰,穿上暖和的衣服;如果主句是一般将来时,从句必须用一般现在时;例句You will be late for school if you get up late.如果你起晚了,你上学将迟到;If it rains tomorrow, we won’t go to the Great Wall.如果明天下雨,我们就不去长城了;3在if引导的条件状语从句中,当主句是一般将来时时,不能使用be going to结构,而要用will;例句I’ll help you with your English if I am free tomorrow.如果明天我有空,我会帮助你学英语;4在if引导的条件状语从句中不能使用some,而要用any;例句If you have any questions to ask, please come to my office.如果你有问题要问的话,请到我办公室来;5同义句转换if引导的条件状语从句可转换成简单句,其方法如下：借助“祈使句+and/ or+简单句”结构;其中and表示句意顺承,or表示句意转折;例句If you work hard, you’ll pass the exam.=Work hard, and you’ll pass the exam.如果你努力学习,你就会通过考试;If you don’t hurry up, you’ll be late.= H urry up, or you’ll be late.如果你不快点,你将会迟到;借助介词with 或without来转换;例句If you help me, I’ll finish my job soon.=With your help, I’ll finish my job soon.如果你帮我,我将很快完成我的工作;If there is no water, fish may die.= Fish may die without water.如果没有水,鱼可能会死;另外,if从句还表示不可实现的条件或根本不可能存在的条件,即一种虚拟的条件或假设;从句多用一般过去时或过去完成时,表示对现在或过去的一种假设;例句If I were you,I would invite him to the party．如果我是你,我会邀请他参加聚会;I would have arrived much earlier if I had not been caught in the traffic．要不是交通堵塞,我会来得更早一些;4. 口诀：if 条件句不一般,几个要点记心间；条件句,放在前,逗号要放句中间;条件句表可能,主句多用将来时；条件句表事实,主句常用现在时;III. If引导的宾语从句和条件状语从句的区别if引导条件状语从句时意为“如果”,引导宾语从句时意为“是否”,可用whether替换;例句1 We will go out if it is fine tomorrow. 如果明天天好,我们就出去;2 I don’t know if the train has arrived. 我不知道火车是否已经到达;句1中if引导的是状语从句;这个从句表示“条件”;句2中if引导的是宾语从句,充当谓语动词don’t know的宾语;考题链接I don’t know _________ he will come tomorrow. _________ he comes, I’ll tell you．A. if; WhetherB. whether; WhetherC. if; ThatD. if; If答案：D解题思路：第一个空处为宾语从句的引导词,用if、whether都可以；第二个空为条件状语从句的引导词,需用if,综合考虑,D项正确;二提分技巧1. 熟练掌握if引导的宾语从句与条件状语从句的特点;2. 熟知if引导的宾语从句与条件状语从句引导词的区别;三即学即练I. 句型转换1. Do they want fried chicken He asked the boys.改为宾语从句He asked the boys _______they ______fried chicken.2. Was the watch made in Shanghai I don’t know.改为宾语从句I don’t know _______the watch _______made in Shanghai.3. “Do you want to try something new ”Tom’s mother asked him.同义句转换Tom’s mother asked him _____________________to try something new.答案：1. if / whether, wanted 2. if / whether, was 3. if / whether he wantedII. 用括号中所给动词的适当形式填空1. If it _________ not raintomorrow, _________let us go shopping.2. Please _________ tellme if you _________ go.3. If you _________ beill, you _________ haveto see the doctor.4. I _________ leavefor Beijing if it _________not snow this afternoon.答案：1. doesn’t rain, let 2. tell, go 3. are, have 4. will leave, doesn’t snowIII. 将下列句子翻译成英语;1. 如果明天不下雨,我就和同学们去野餐;________________________________________________________.2. 如果周日你去购物的话,我就去;________________________________________________________.3. 如果你想减肥lose weight,就锻炼身体吧;________________________________________________________.4. 如果冬天来了,春天还会远吗________________________________________________________.5. 如果可能的话,我就去火车站接你;________________________________________________________.答案：1. If it doesn’t rain tomorrow, I will have a picnic with my classmates.2. I will go shopping on Sunday if you do.3. Take some exercise if you want to lose weight.4. If winter comes, can spring be far behind5. If it is possible, I’ll meet you at the train station.下学期期中复习一一、预习新知Module 1-Module 5重点基础知识二、预习点拨思考问题一：能否先把这5个模块的重点单词、短语、语法整理一下思考问题二：我们已经学习了哪些语法哪些还是你比较薄弱的答题时间：45分钟一、用所给动词的适当形式填空;1. If you ________feel tired, you _______________ have to have a rest.2. Where _______ he _________see the film if he ________________have time3. If there __________be fewer trees, there _______________be more pollution.4. He _____________dress more casually if he ________________not work on weekends.5. If Marcia _____________live alone, she ___________________keep a pet parrot.6. Lana ________________buy a new dress if the old one ____________be out of style.7. The twins ______________fight if they_______________argue.8. I ____________have a bake sale if I _____________need money for education.9. Peter _____________send me a beautiful souvenir if he ________________tour Spain.10. If Mr Green ___________say I am hard- working, my parents _________feel glad.11.I ____________go to the beach if it________________ not rain this week.12. __________they __________have a match if the P.E. teacher _____________be busy13. He ____write a letter to his grandparents if he ____get his report card this week.14. If she ____________get up late, she _____________ not catch the early bus.15. Peter ________major in English if he ____pass the exams in Peking University.二、完成句子每空一词;1. 如果你要过马路,不要乱跑;_____ _____ around if you cross the road.2. 明天如果下雨的话,我们将呆在家里;We _____ _____ at home if it _____ tomorrow.3. 如果你能说好英语的话,你就可以容易地与外国人交谈;If you can _____ English well, you _____ ______ ______ foreigners easily. 4. 如果你对别人好,人们也会对你好;If you’re nice to people, they _____ _____ _____ to you, too.5. 如果学生不对考试如此担心的话,他们会更开心的;If students don’t worry about exams so much, they _____ ______ ______.6. 他如果电视看太多了,他的父母会不高兴;If he _________ TV too much, his parents __________ __________ unhappy.7. 如果我们为他组织生日聚会,大家都会来的;Everyone ________ ________ if we _____________ a birthday party __________ him.8. 如果明天不下雨,我会和你一起去公园的;If it __________ __________ tomorrow, I ______________ go to the park _________ you.9. 如果他有空,他会帮助你的;If he ________ _________, he _________ ________ you.10. 如果Tom考试不及格,他就没有机会上高中了;Tom _________have the ________to go to the senior high school if he ______________ the exams.三、同义句转换;1. Study hard, or you won’t pass the exam.If you study hard, you _____ _____ the exam.2. Take a taxi, and you’ll catch the train._____ you _____ a taxi, you’ll catch the train.3. If you go to bed early, you won’t feel tired in the morning._____ _____ _____ early, _____ you won’t feel tired in the morning.4. If you don’t work hard, your teacher will probably be angry.______ _____, _____ your teacher will probably be angry.5. Breathe deeply for one minute, and you’ll feel relaxed._____ you ______ deeply for one minute, you _____ _____ relaxed.四、阅读下面的广告,然后用“if..., ...will...”的句式回答问题;Travel BrochureCheap Cheap Cheap. Beijing for the weekend. 3D/2N. Book Now.Five Star Hotel—Save 50%Four Star Hotel—Save 40%Three Star Hotel—Save 30%Book before December 31st. Breakfast Included.City Tour 50RMB. Visit the Great Wall 100 RMB.1. How much will you save if you stay at the Four Star Hotel___________________________________2. How much will you save if you stay at the Three Star Hotel___________________________________3. What will happen if you book after December 31st___________________________________4. How much will you have to pay if you want to go on the City Tour___________________________________5. How much will you have to pay if you want to visit the Great Wall___________________________________五、单项选择1. If you _____ to the party, you’ll have a great time.A. will goB. wentC. goD. going2. It will be a long time ____ Peter _____ his work.A. since, has finishedB. after, finishesC. when, will finishD. before, finishes3. What will father _____ us from JapanA. takeB. bringC. carryD. make4. Weifang is famous ______ kites.A. forB. toC. onD. with5. I ____ her the answer if she ____me.A. can tell, will askB. will tell, will askC. would tell, askD. will tell, asks6. —What are you going to do tomorrow—We’ll go to the library tomorrow if it ___.A. isn’t rainB. rainC. won’t rainD. doesn’t rain7. —Do you know when he will come back tomorrow—Sorry, I don’t know. When he ____ back, I’ll tell you.A. comesB. will comeC. comeD. may come8. What will you do if you _____ to the old folk’s home visitA. goB. wentC. goingD. will go9. If I eat ____ food, I’ll be very fat.A. too manyB. many tooC. too muchD. much too10. I’ll give the book to him if he ___ here next Sunday.A. will comeB. comesC. is comingD. came11. There ____an English film in our school tomorrow.A. is going to haveB. will haveC. is going to beD. has12. Could you tell us where ____A. will the next Olympic Games heldB. the next Olympic Games will be heldC. would the next Olympic Games be heldD. the next Olympic Games would be held13. When my mother returned last night, I ____a book.A. readB. am readingC. was readingD. am going to read14. What ____ you ____ when it began to rainA. do, doB. were, doingC. are, doingD. did, do15. I’ll wake you up when he ____back.A. willB. is going to comeC. comesD. come一、1. feel, have 2. will, see, has 3. are , will be 4. will dress, doesn’t work 5. lives, will keep 6. will buy, is 7. will fight, argue 8. will have, need9. will send, tours 10. says, will feel 11. will go, doesn’t rain12. Will, have, is13. will write, gets 14. gets, won’t catch 15. will major, passes二、1. Don’t run 2. will stay, rains 3. speak, can talk with4. will be nice5. will be happier6. watches, will be7. will come, have, for8. doesn’t rain, will, with 9. is free, will help 10. won’t, chance, doesn’t pass三、1. will pass 2. If, take 3. Go to bed, and 4. Work hard, or 5. If, breathe, will feel四、1. If I stay at the Four Star Hotel, I will save 40%.2. If I stay at the Three Star Hotel, I will save 30%.3. If I book after December 31st, it will be too late and more expensive.4. If I want to go on the City Tour, I will have to pay 50 RMB.5. If I want to visit the Great Wall, I will have to pay 100 RMB.五、1—5 CDBAD 6—10 DAACB 11—15 CBCBC。
If引导的两种从句(宾语从句和条件状语从句)
重点、难点1.含有 if 引导的条件状语从句的复合句中主从句的时态。
2.If 引导的宾语从句与条件状语从句的区别。
考情分析通常在单项选择、完形填空或补全、完成句子等题型中考查，分值约3—4 分。
知能提升（一）知识讲解【认知讲解】I. if 引导的宾语从句if 引导宾语从句时，意思为：是否，从句的时态通常要和主句保持一致。
【例句】I want to know if he lives there. 我想知道他是否住在那儿。
He asked me if I could help him. 他问我是否能帮他。
【考查点】 if 、 whether 引导的宾语从句的区别1. if 或 whether 引导宾语从句时，作“是否”讲，常放在动词ask、see、say、know 和 find out 等后面。
一般情况下，两者常可换用，在口语中多用if 。
【例句】Nobody knows whether / if it will rain tomorrow.没有人知道明天是否下雨。
Lucy asked whether / if they had a cotton sweater.露西问他们是否有棉制的毛衣。
2.if 或 whether 引导宾语从句时，要注意三个方面，即连词、语序和时态。
if 或 whether 既不能和that 或其他连词（副词）同时使用，也不能省略。
【例句】我不知道他今天是否会来。
[ 误 ] I don ’ t know that if(whether) he will come here today.[ 正 ] I don ’ t know if(whether) he will come here today.他走过来看看猫是否出了毛病。
[ 误 ] He came to see what if (whether) there was anything wrong with his cat .[ 正 ] He came to see if (whether) there was anything wrong with his cat .if 或 whether 引导宾语从句时，虽具有疑问的意义，但其从句应用陈述句的语序。
If引导的宾语从句和条件状语从句
If带领的宾语从句战条件状语从句之阳早格格创做【沉面、易面】1. 含有if带领的条件状语从句的复合句中主从句的时态.2. If带领的宾语从句取条件状语从句的辨别.【考情分解】常常正在单项采用、完形挖空或者补齐、完毕句子等题型中考查，分值约3—4分.【知识道解】宾语从句【例句】I want to know if he lives there.He asked me if I could help him.【考查面】if、whether带领的宾语从句的辨别：从含意、连词汇、语序战时态等圆里区别.1.含意if或者whether带领宾语从句时，做“是可”道，二者常可换用，正在心语中多用if.【例句】Nobody knows whether / if it will rain tomorrow.Lucy asked whether / if they had a cotton sweater.2.取连词汇（副词汇）闭系if或者whether既没有克没有及战that 或者其余连词汇（副词汇）共时使用，也没有克没有及简略.【例句】[误] I don’t know that if(whether) he will come here today.[正] I don’t know if(whether) he will come here today.[误] He came to see what if (whether) there was anything wrong with his cat .[正] He came to see if (whether) there was anything wrong with his cat .3.语序if或者whether带领宾语从句时，虽具备疑问的意义，但是其从句应用报告句的语序.【例句】The old woman asked me if / whether I knew the way to the hospital.4.时态if或者whether带领的宾语从句应战主句的时态脆持普遍.即主句为普遍当前时，从句用任一种时态；主句为普遍往日时，从句则用往日时中的任一种时态.【例句】I don’t know if (whether) he has come here.Tom asked if (whether) I had read the book.5.只可用whether的情况（1）正在动词汇没有定式之前只可用whether【例句】I can’t decide whether to stay.（2）正在whether …or not 的牢固拆配中【例句】I want to know whether it’s good news or not.（3）正在介词汇后，只可用whether【例句】His father is worried about whether he loses his work.（4）用if会引起歧义时【例句】Could you tell me if you know the answer? 那句话有二种意义：“您能报告尔您是可了解问案吗？”或者“如果您了解问案，请报告尔，佳吗？”. 如用whether则可预防歧义.状语从句if带领的条件状语从句：从含意、时态战用法三个圆里去钻研.1.含意条件状语从句是正在复合句中做条件状语的句子，if做”如果、假若”道.【例句】 You will catch the bus if you get up early.2.时态（1）主祈从现：主句是祈使句, 从句是由if带领的使用普遍当前时的句子.【例句】If you want to go, please tell me.Print the photo if you like it.（2）主将从现：指if带领的条件状语从句用普遍当前时，主句用普遍将去时.【例句】If it doesn’t rain tomorrow, we’ll go to t he Great Wall.If you don’t get up early, you will be late for school.（3）主情从现当主句是普遍当前时（含情态动词汇can, may, must等的句子），从句也用普遍当前时.【例句】 You must see the doctor if you are ill.3.用法（1）位子if带领的条件状语从句，既可搁正在主句之前也可搁正在主句之后.当从句置于主句之前时，时常使用逗号取主句隔启.【例句】You will catch the bus if you get up early. =Ifyou get up early, you will catch the bus.（2）正在if带领的条件状语从句中，当主句是普遍将去常常，没有克没有及使用be going to结构，而要用will.【例句】I’ll help you with your English if I am freetomorrow.（3）正在if带领的条件状语从句中没有克没有及使用some，而要用any.【例句】If you have any questions to ask, please cometo my office.（4）共义句变换，if带领的条件状语从句可变换成简朴句，其要领如下：“祈使句+and/ or+简朴句”结构.其中and表示句意逆启，or表示句意转合.【例句】If you work hard, you’ll pass the exam.=Work hard, and you’ll pass the exam. If you don’thurry up, you’ll be late.=Hurry up, or you’ll be late.。
If引导的两种从句(宾语从句和条件状语从句)-if引导的
重点、难点之巴公井开创作1. 含有if引导的条件状语从句的复合句中主从句的时态。
2. If引导的宾语从句与条件状语从句的区别。
考情分析通常在单项选择、完形填空或补全、完成句子等题型中考查，分值约3—4分。
知能提升（一）知识讲解【认知讲解】I. if引导的宾语从句if 引导宾语从句时，意思为：是否，从句的时态通常要和主句坚持一致。
【例句】I want to know if he lives there.我想知道他是否住在那儿。
He asked me if I could help him.他问我是否能帮他。
【考查点】if、whether引导的宾语从句的区别1. if或whether引导宾语从句时，作“是否”讲，常放在动词ask、see、say、know和find out等后面。
一般情况下，两者常可换用，在口语中多用if。
【例句】Nobody knows whether / if it will rain tomorrow.没有人知道明天是否下雨。
Lucy asked whether / if they had a cotton sweater.露西问他们是否有棉制的毛衣。
2. if或whether引导宾语从句时，要注意三个方面，即连词、语序和时态。
if或whether既不克不及和that 或其他连词（副词）同时使用，也不克不及省略。
【例句】我不知道他今天是否会来。
[误]I don’t know that if(whether) he will come here today.[正]I don’t know if(whether) he will come here today.他走过来看看猫是否出了毛病。
[误]He came to see what if (whether) there was anything wrong with his cat .[正] He came to see if (whether) there was anything wrong with his cat .if或whether引导宾语从句时，虽具有疑问的意义，但其从句应用陈述句的语序。
If引导的两种从句(宾语从句和条件状语从句)-if引导的
重点、难点之宇文皓月创作1. 含有if引导的条件状语从句的复合句中主从句的时态。
2. If引导的宾语从句与条件状语从句的区别。
考情分析通常在单项选择、完形填空或补全、完成句子等题型中考查，分值约3—4分。
知能提升（一）知识讲解【认知讲解】I. if引导的宾语从句if 引导宾语从句时，意思为：是否，从句的时态通常要和主句坚持一致。
【例句】I want to know if he lives there. 我想知道他是否住在那儿。
He asked me if I could help him. 他问我是否能帮他。
【考查点】if、whether引导的宾语从句的区别1. if或whether引导宾语从句时，作“是否”讲，常放在动词ask、see、say、know和find out等后面。
一般情况下，两者常可换用，在口语中多用if。
【例句】Nobody knows whether / if it will rain tomorrow.没有人知道明天是否下雨。
Lucy asked whether / if they had a cotton sweater.露西问他们是否有棉制的毛衣。
2. if或whether引导宾语从句时，要注意三个方面，即连词、语序和时态。
if或whether既不克不及和that 或其他连词（副词）同时使用，也不克不及省略。
【例句】我不知道他今天是否会来。
[误]I don’t know that if(whether) he will come here today.[正]I don’t know if(whether) he will come heretoday.他走过来看看猫是否出了毛病。
[误] He came to see what if (whether) there was anything wrong with his cat .[正] He came to see if (whether) there was anything wrong with his cat .if或whether引导宾语从句时，虽具有疑问的意义，但其从句应用陈述句的语序。
If状语从句与宾语从句的区分和应用
If 的应用一、区分（注意与另一连接词that区分）↑真实→条件状语从句→主将从现原则如果过去主：主语+ should/would/could/might + have done从：if + 主语+ had + done非真实→虚拟语气现在主：主语+should/would/could/might + do从：if +主语+过去时（be用were）If将来主：主语+ should + do从：a）if + 主语+ were to dob）if + 主语+ should/would/could/might + doc）if + 主语+ did（动词过去式）/were 是否→宾语从句↓（注意与whether区分）二、条件状语从句If在条件状语从句和虚拟语气中，译为“如果”。
不同的是，条件状语从句中，if是表示真实存在，客观事实的。
需要注意区分以下时态：1. 主将从现E.g. When I grow up, I will be a policeman.2. 主祈从现（祈使句，从句用一般现在时）E.g. Don’t laugh at me when I make a mistake.3. 主情从现（主句含有情态动词的一般现在时，根据情况需要从句多用一般现在时）E.g. You should be quiet when you are in the library.注意：①if 引导的条件状语从句，既可以放在主句之前也可以放在主句之后。
当从句置于主句之前时，常用逗号与主句隔开。
②在if引导的条件状语从句中，主句时一般将来时时，不能使用be going to结构，而要用will。
②在if引导的条件状语从句中不能使用some，而要用any。
④同义句转换，if引导的条件状语从句可转换成简单句，如：“祈使句+and/or+简单句”结构。
其中and表示句意顺承，or表示句意转折。
三、虚拟语气If 表示假设、推测、不可能实现时，使用虚拟语气，同样译为“如果”，分三种情况：1.过去主：主语+ should/would/could/might + have done从：if + 主语+ had + doneE.g. If I had got up early yesterday, I wouldn't have been late.2.现在主：主语+should/would/could/might + do从：if +主语+过去时（be用were）E.g. If I were you, I would change myself for her.3.将来主：主语+ should + do从：a）if + 主语+ were to dob）if + 主语+ should/would/could/might + doc）if + 主语+ did（动词过去式）/wereE.g.If it were to rain, I should buy an umbrella.If he should dare to show his face again, I should give him a piece of my mind.If he dared to show his face again, I should give him a piece of my mind.四、宾语从句If 在宾语从句中的应用与意思与状语从句中不同，译为“是否”，常放在动词ask, see,say,know和find out等后面（注意与连接词“whether”区分，在之后会给出具体区分方法）。
If引导的两种从句(宾语从句和条件状语从句)-if引导的
重点、难点之杨若古兰创作1. 含有if引诱的条件状语从句的复合句中主从句的时态.2. If引诱的宾语从句与条件状语从句的区别.考情分析通常在单项选择、完形填空或补全、完成句子等题型中考查，分值约3—4分.知能提升（一）常识讲解【认知讲解】I. if引诱的宾语从句if 引诱宾语从句时，意思为：是否，从句的时态通常要和主句坚持分歧.【例句】I want to know if he lives there.我想晓得他是否住在那儿.He asked me if I could help him.他问我是否能帮他.【考查点】if、whether引诱的宾语从句的区别1. if或whether引诱宾语从句时，作“是否”讲，常放在动词ask、see、say、know和find out等后面.普通情况下，两者常可换用，在口语中多用if.【例句】Nobody knows whether / if it will rain tomorrow.没有人晓得明天是否下雨.Lucy asked whether / if they had a cotton sweater.露西问他们是否有棉制的毛衣.2. if或whether引诱宾语从句时，要留意三个方面，即连词、语序和时态.if或whether既不克不及和that 或其他连词（副词）同时使用，也不克不及省略.【例句】我不晓得他今天是否会来.[误]I don’t know that if(whether) he will come here today.[正]I don’t know if(whether) he will come here today.他走过来看看猫是否出了毛病.[误]He came to see what if (whether) there was anything wrong with his cat .[正] He came to see if (whether) there was anything wrong with his cat .if或whether引诱宾语从句时，虽具有疑问的意义，但其从句利用陈述句的语序.【例句】Did you know the way to the hospital? The old woman asked me.The old woman asked me if / whether I knew the way to the hospital.老妇人问我是否晓得去病院的路.if或whether引诱的宾语从句应和主句的时态坚持分歧.即主句为普通此刻时，从句用任一种时态；主句为普通过去时，从句则用过去时中的任一种时态.【例句】I don’t know if (whether) he has come here.我不晓得他是否来过这儿.Tom asked if (whether) I had read the book.汤姆问我是否看过这本书.3. 只能用whether的情况在动词不定式之前只能用whether：【例句】I can’t decide whether to stay.我不克不及决定是否留下.在whether …or not 的固定搭配中：【例句】I want to know whether it’s good news or not.我想晓得它是不是好动静.在介词后，只能用whether：【例句】His father is worried about whether he loses his work.他的父亲担心他是否会失去工作.用if会惹起歧义时：【例句】Could you tell me if you know the answer?这句话有两种意思：“你能告诉我你是否晓得答案吗？”或“如果你晓得答案，请告诉我，好吗？”.如用whether则可防止歧义.【考题链接】I don’t know _________they could pass the exam or not.A. whyB.ifC. thatD. whether答案：D解题思路：本题考查if与whether的区别，在whether…or not的固定搭配中通常只用whether.II. if引诱的条件状语从句条件状语从句是在复合句中作条件状语的句子.暗示假如有从句的动作发生就会有主句的动作发生，条件状语从句常由从属连词if引诱.【例句】You will catch the bus if you get up early.如果你夙起的话，就能赶上公共汽车.2. 类别主祈从现：主句是祈使句,从句是由if引诱的使用普通此刻时的句子.【例句】If you want to go, please tell me. 如果你想去，请告诉我.Print the photo if you like it.如果你爱好这照片就把它打印出来.主将从现：指if引诱的条件状语从句用普通此刻时，主句用普通将来时.【例句】If it doesn’t rain tomorrow, we’ll go to the Great Wall.如果明天不下雨，我们就会去长城.If you don’t get up early, you will be late for school.如果你不早点起床，你上学就会迟到.3. if引诱的条件状语从句用法：（1）地位if引诱的条件状语从句，既可放在主句之前也可放在主句以后.当从句置于主句之前时，经常使用逗号与主句隔开.【例句】You will catch the bus if you get up early.=If you get up early, you will catch the bus.如果你夙起的话，就能赶上公共汽车.（2）时态应遵守主、从句时态呼应的准绳.当主句是普通此刻时（包含祈使句和含情态动词can, may, must等的句子），从句也用普通此刻时.【例句】You must see the doctor if you are ill.如果你生病了，你必须去看大夫.If you want to go skating, wear warmclothes.如果你想去溜冰，穿上暖和的衣服.如果主句是普通将来时，从句必须用普通此刻时.【例句】You will be late for school if you get up late.如果你起晚了，你上学将迟到.If it rains tomorrow, we won’t go to the Great Wall.如果明天下雨，我们就不去长城了.（3）在if引诱的条件状语从句中，当主句是普通将来时时，不克不及使用be going to结构，而要用will.【例句】I’ll help you with your English if I am free tomorrow.如果明天我有空，我会帮忙你学英语.（4）在if引诱的条件状语从句中不克不及使用some，而要用any.【例句】If you have any questions to ask, please come to my office.如果你有成绩要问的话，请到我办公室来.（5）同义句转换if引诱的条件状语从句可转换成简单句，其方法如下：* 借助“祈使句+and/ or+简单句”结构.其中and暗示句意顺承，or暗示句意转机.【例句】If you work hard, you’ll pass the exam.=Work hard, and you’ll pass the exam.如果你努力进修，你就会通过考试.If you don’t hurry up, you’ll be late.= Hurry up, or you’ll be late.如果你不快点，你将会迟到.**借助介词with 或without来转换.【例句】If you help me, I’ll finish my job soon.=With your help, I’ll finish my job soon.如果你帮我，我将很快完成我的工作.If there is no water, fish may die.= Fish may die without water.如果没有水，鱼可能会死.另外，if从句还暗示不成实现的条件或根本不成能存在的条件，即一种虚拟的条件或假设.从句多用普通过去时或过去完成时，暗示对此刻或过去的一种假设.【例句】If I were you，I would invite him to the party．如果我是你，我会约请他介入聚会.I would have arrived much earlier if I had not been caught in the traffic．要不是交通堵塞，我会来得更早一些.4. 口诀：if 条件句纷歧般，几个要点记心间；条件句，放在前，逗号要放句两头.条件句表可能，主句多用将来时；条件句表事实，主句经常使用此刻时.III. If引诱的宾语从句和条件状语从句的区别if引诱条件状语从句时意为“如果”，引诱宾语从句时意为“是否”，可用whether替换.【例句】1) We will go out if it is fine tomorrow.如果明天天好，我们就出去.2) I do n’t know if the train has arrived. 我不晓得火车是否曾经到达.句1)中if引诱的是状语从句.这个从句暗示“条件”.句2)中if引诱的是宾语从句，充当谓语动词don’t know 的宾语.【考题链接】I don’t know _________ he will come tomorrow. _________ he comes, I’ll tell you．A. if; WhetherB. whether; WhetherC. if; ThatD. if; If答案：D解题思路：第一个空处为宾语从句的引诱词，用if、whether都可以；第二个空为条件状语从句的引诱词，需用if，综合考虑，D项准确.（二）提分技巧1. 熟练把握if引诱的宾语从句与条件状语从句的特点.2. 熟知if引诱的宾语从句与条件状语从句引诱词的区别.（三）即学即练I. 句型转换1. Dotheywantfriedchicken?Heaskedtheboys.(改为宾语从句) Heaskedtheboys_______they______friedchicken.2. WasthewatchmadeinShanghai?Idon’tknow.(改为宾语从句) Idon’tknow_______thewatch_______madeinShanghai.3.“Doyouwanttotrysomethingnew?”Tom’smotheraskedhim.(同义句转换)Tom’smotheraskedhim_____________________totrysomet hingnew.答案：1. if / whether, wanted 2. if / whether, was 3. if / whether he wantedII. 用括号中所给动词的适当方式填空1. If it _________ (not rain)tomorrow, _________(let) us go shopping.2. Please _________ (tell)me if you _________ (go).3. If you _________ (be)ill, you _________ (have)to see the doctor.4. I _________ (leave)for Beijing if it _________(not snow) this afternoon.答案：1. doesn’t rain, let 2. tell, go 3. are, have 4. will leave, doesn’t snowIII. 将以下句子翻译成英语.1. 如果明天不下雨，我就和同学们去野餐.___________________________________________________ _____.2. 如果周日你去购物的话，我就去.___________________________________________________ _____.3. 如果你想减肥（lose weight），就锻炼身体吧.___________________________________________________ _____.4. 如果冬天来了，春天还会远吗？___________________________________________________ _____.5. 如果可能的话，我就去火车站接你.___________________________________________________ _____.答案：1. If it doesn’t rain tomorrow, I will have a picnic with my classmates.2. I will go shopping on Sunday if you do.3. Take some exercise if you want to lose weight.4. If winter comes, can spring be far behind?5. If (it is) possible, I’ll meet you at the train station.下学期期中复习（一）一、预习新知Module 1-Module 5重点基础常识二、预习点拨思考成绩一：能否先把这5个模块的重点单词、短语、语法清算一下？思考成绩二：我们曾经进修了哪些语法？哪些还是你比较单薄的？（答题时间：45分钟）一、用所给动词的适当方式填空.1.If you ________(feel) tired, you _______________ (have) to have a rest.2. Where _______ he _________(see) the film if he ________________(have) time?3. If there __________(be) fewer trees, there _______________(be) more pollution.4. He _____________(dress) more casually if he ________________(not work) on weekends.5. If Marcia _____________(live) alone, she ___________________(keep) a pet parrot.6. Lana ________________(buy) a new dress if the old one ____________(be) out of style.7.The twins ______________(fight) if they_______________(argue).8. I ____________(have) a bake sale if I _____________(need) money for education.9. Peter _____________(send) me a beautiful souvenir if he ________________(tour) Spain.10. If Mr Green ___________(say) I am hard- working, my parents _________(feel) glad.11.I ____________(go) to the beach if it________________ (not rain) this week.12. __________they __________(have) a match if the P.E. teacher _____________(be) busy?13.He ____(write) a letter to his grandparents if he ____(get) his report card this week.14. If she ____________(get) up late, she _____________ (not catch) the early bus.15. Peter ________(major) in English if he ____(pass) the exams in PekingUniversity.二、完成句子（每空一词）.1. 如果你要过马路，不要乱跑._____ _____ around if you cross the road.2. 明天如果下雨的话，我们将呆在家里.We _____ _____ at home if it _____ tomorrow.3. 如果你能说好英语的话，你就可以容易地与本国人交谈.If you can _____ English well, you _____ ______ ______ foreigners easily.4.如果你对他人好，人们也会对你好.If you’re nice to people, they _____ _____ _____ to you, too.5.如果先生分歧错误考试如此担心的话，他们会更开心的.If students don’t worry about exams so much, they _____ ______ ______.6. 他如果电视看太多了，他的父母会不高兴.If he _________ TV too much, his parents __________ __________ unhappy.7. 如果我们为他组织生日聚会，大家都会来的.Everyone ________________ if we _____________ a birthday party __________ him.8. 如果明天不下雨，我会和你一路去公园的.If it __________ __________ tomorrow, I ______________ go to the park _________ you.9. 如果他有空，他会帮忙你的.If he _________________, he _________________you. 10.如果Tom考试不及格，他就没无机会上高中了.Tom _________have the ________to go to the senior high school if he _______ _______ the exams.三、同义句转换.1. Study hard, or you won’t pass the exam.If you study hard, you _____ _____ the exam.2. Take a taxi, and you’ll catch the train._____ you _____ a tax i, you’ll catch the train.3. If you go to bed early, you won’t feel tired in the morning._____ _____ _____ early, _____ you won’t feel tired in the morning.4. If you don’t work hard, your teacher will probably be angry.______ _____, _____ your teacher will probably be angry.5. Breathe deeply for one minute, and you’ll feel relaxed._____ you ______ deeply for one minute, you _____ _____ relaxed.四、浏览上面的广告，然后用“if..., ...will...”的句式回答成绩.Travel BrochureCheap Cheap Cheap. Beijing for the weekend. 3D/2N. Book Now.Five Star Hotel—Save 50%Four Star Hotel—Save 40%Three Star Hotel—Save 30%Book before December 31st. Breakfast Included.City Tour 50RMB. Visit the Great Wall 100 RMB.1. How much will you save if you stay at the Four Star Hotel?___________________________________2. How much will you save if you stay at the Three Star Hotel?___________________________________3. What will happen if you book after December 31st?___________________________________4. How much will you have to pay if you want to go on the City Tour?___________________________________5. How much will you have to pay if you want to visit the Great Wall?___________________________________五、单项选择1.If you _____ to the party, you’ll have a great time.A. will goB. wentC. goD. going2. It will be a long time ____ Peter _____ his work.A. since, has finishedB. after, finishesC. when, will finishD. before, finishes3. What will father _____ us from Japan?A. takeB. bringC. carryD. make4. Weifang is famous ______ kites.A. forB. toC. onD. with5. I ____ her the answer if she ____me.A. can tell, will askB. will tell, will askC. would tell, askD.will tell, asks6. —What are you going to do tomorrow?—We’ll go to the library tomorrow if it ___.A. isn’t rainB. rainC. won’t rainD. doesn’t rain7.—Do you know when he will come back tomorrow?—Sorry, I don’t know. When he ____ back, I’ll tell you.A. comesB. will comeC. comeD. may come8. What will you do if you _____ to the old folk’s home visit?A. goB. wentC.goingD. will go9. If I eat ____ food, I’ll be very fat.A. too manyB. many tooC. too muchD. much too10. I’ll give the book to him if he ___ here next Sunday.A. will comeB. comesC. is comingD. came11. There ____an English film in our school tomorrow.A. is going to haveB. will haveC. is going to beD. has12. Could you tell us where ____？A. will the next Olympic Games heldB. the next Olympic Games will be heldC. would the next Olympic Games be heldD. the next Olympic Games would be held13. When my mother returned last night, I ____a book.A. readB. am readingC. was readingD. am going to read14.What ____ you ____ when it began to rain?A. do, doB. were, doingC. are, doingD. did, do15. I’ll wake you up when he ____back.A. willB. is going to comeC. comesD. come一、1. feel, have 2. will, see, has 3. are , will be 4. will dress, doesn’t work 5. lives, will keep6. will buy, is 7. will fight, argue 8. will have, need9. will send, tours 10. says, will feel11. will go, doesn’t rain 12. Will, have, is13. will write, gets 14. gets, won’t catch 15. will major, passes二、1. Don’t run2. will stay, rains3. speak, can talk with4. will be nice5. will be happier6. watches, will be7. will come, have, for8. doesn’t rain, will, with 9. is free, will help 10. won’t, chance, doesn’t pass三、1. will pass 2. If, take3. Go to bed, and4. Work hard, or5. If, breathe, will feel四、1. If I stay at the Four Star Hotel, I will save 40%.2. If I stay at the Three Star Hotel, I will save 30%.3. If I book after December 31st, it will be too late and more expensive.4. If I want to go on the City Tour, I will have to pay 50 RMB.5. If I want to visit the Great Wall, I will have to pay 100 RMB.五、1—5 CDBAD 6—10 DAACB 11—15 CBCBC。
If引导的两种从句(宾语从句和条件状语从句)
If you haveanyquestions to ask, please come to my office.
如果你有问题要问的话，请到我办公室来。
（5）同义句转换
if引导的条件状语从句可转换成简单句，其方法如下：
*借助“祈使句+and/ or+简单句”结构。其中and表示句意顺承，or表示句意转折。
He asked the boys _______they ______fried chicken.
2. Was the watch made inShanghai? I don’t know.(改为宾语从句)
I don’t know _______the watch _______made in Shanghai.
【例句】
If you work hard, you’ll pass the exam.
=Work hard, and you’ll pass the exam.
如果你努力学习，你就会通过考试。
If you don’t hurry up, you’ll be late.
= Hurry up, or you’ll be late.
4. I _________ (leave)forBeijingif it _________(not snow) this afternoon.
答案：1. doesn’t rain, let 2. tell, go 3. are, have 4. will leave, doesn’t snow
III.将下列句子翻译成英语。
这句话有两种意思：
“你能告诉我你是否知道答案吗？”或“如果你知道答案，请告诉我，好吗？”。
如用whether则可避免歧义。
If引导两种从句宾语从句及条件状语从句
重点、难点1.含有 if 指引的条件状语从句的复合句中主从句的时态。
2.If 指引的宾语从句与条件状语从句的差别。
考情剖析往常在单项选择、完形填空或补全、达成句子等题型中考察，分值约3— 4 分。
知能提高（一）知识解说【认知解说】I. if 指引的宾语从句if 指引宾语从句时，意思为：能否，从句的时态往常要和主句保持一致。
【例句】I want to know if he lives there.我想知道他能否住在那边。
He asked me if I could help him.他问我能否能帮他。
【考察点】 if、 whether 指引的宾语从句的差别1. if 或 whether 指引宾语从句时，作“能否”讲，常放在动词ask、see、say、know 和 find out 等后边。
一般状况下，二者常可换用，在口语中多用if。
【例句】Nobody knows whether / if it will rain tomorrow.没有人知道明日能否下雨。
Lucy asked whether / if they had a cotton sweater.露西问他们能否有棉制的毛衣。
2.if 或 whether 指引宾语从句时，要注意三个方面，即连词、语序和时态。
if 或 whether 既不可以和t hat或其余连词（副词）同时使用，也不可以省略。
【例句】我不知道他今日能否会来。
[误 ] I don’ t know that if(whether) he will come here today.[正 ] I don’ t know if(whether) he will come here today.他走过来看看猫能否出了缺点。
[误 ] He came to see what if (whether) there was anything wrong with his cat .[正 ] He came to see if (whether) there was anything wrong with his cat .if 或 whether 指引宾语从句时，虽拥有疑问的意义，但其从句应用陈说句的语序。
if条件状语从句和宾语从句的区别
if条件状语从句和宾语从句的区别
if条件状语从句和宾语从句的区别
if条件状语从句和宾语从句常常被混淆，有时，甚至会出现对两者的混淆使用。
他们之间的区别是显而易见的，我们可以通过以下几点来进行区分。
首先，if条件状语从句不能作宾语，而宾语从句则可以作宾语。
其次，if条件状语从句是一种从属的状语，而宾语从句则是它所修饰的动词的宾语。
再次，if条件状语从句中的主语和谓语动词都是动词不定式，而宾语从句中的主语和谓语动词则可以是任何形式的动词。
最后，if条件状语从句中的时态是一般现在时或将来时，而宾语从句则可以有多种时态。
总的来说，if条件状语从句和宾语从句之间的区别主要在于它们所具有的功能不同，它们各自所具有的形式也是不同的。
因此，两者之间的区别是显而易见的，我们在使用的时候应该注意这一点。
- 1 -。
If引导的宾语从句和条件状语从句
If引导的宾语从句和条件状语从句【重点、难点】1. 含有if引导的条件状语从句的复合句中主从句的时态。
2. If引导的宾语从句与条件状语从句的区别。
【考情分析】通常在单项选择、完形填空或补全、完成句子等题型中考查，分值约3—4分。
【知识讲解】if引导的宾语从句if意思为：是否，从句的时态通常要和主句保持一致。
【例句】I want to know if he lives there.He asked me if I could help him.【考查点】if、whether引导的宾语从句的区别：从含义、连词、语序和时态等方面区分。
1.含义if或whether引导宾语从句时，作“是否”讲，两者常可换用，在口语中多用if。
【例句】Nobody knows whether / if it will rain tomorrow.Lucy asked whether / if they had a cotton sweater.2.与连词（副词）关系if或whether既不能和that 或其他连词（副词）同时使用，也不能省略。
【例句】[误] I don’t know that if(whether) he will come here today.[正] I don’t know if(whether) he will come here today.[误] He came to see what if (whether) there was anything wrong with his cat .[正] He came to see if (whether) there was anything wrong with his cat .3.语序if或whether引导宾语从句时，虽具有疑问的意义，但其从句应用陈述句的语序。
【例句】The old woman asked me if / whether I knew the way to the hospital.4.时态if或whether引导的宾语从句应和主句的时态保持一致。
If引导的两种从句(宾语从句和条件状语从句)-if引导的
重点、难点1. 含有if引导的条件状语从句的复合句中主从句的时态。
2. If引导的宾语从句与条件状语从句的区别。
考情分析通常在单项选择、完形填空或补全、完成句子等题型中考查，分值约3—4分。
知能提升（一）知识讲解【认知讲解】I. if引导的宾语从句if 引导宾语从句时，意思为：是否，从句的时态通常要和主句保持一致。
【例句】I want to know if he lives there. 我想知道他是否住在那儿。
He asked me if I could help him. 他问我是否能帮他。
【考查点】if、whether引导的宾语从句的区别1. if或whether引导宾语从句时，作“是否”讲，常放在动词ask、see、say、know和find out等后面。
一般情况下，两者常可换用，在口语中多用if。
【例句】Nobody knows whether / if it will rain tomorrow.没有人知道明天是否下雨。
Lucy asked whether / if they had a cotton sweater.露西问他们是否有棉制的毛衣。
2. if或whether引导宾语从句时，要注意三个方面，即连词、语序和时态。
if或whether既不能和that 或其他连词（副词）同时使用，也不能省略。
【例句】我不知道他今天是否会来。
[误] I don’t know that if(whether) he will come here today.[正] I don’t know if(whether) he will come here today.他走过来看看猫是否出了毛病。
[误] He came to see what if (whether) there was anything wrong with his cat .[正] He came to see if (whether) there was anything wrong with his cat .if或whether引导宾语从句时，虽具有疑问的意义，但其从句应用陈述句的语序。
中考英语备课指导：If引导的两种从句(宾语从句和条件状语从句)
中考If引导的两种从句（宾语从句和条件状语从句）If引导的两种从句(宾语从句和条件状语从句)重点、难点1. 含有if引导的条件状语从句的复合句中主从句的时态。
2. If引导的宾语从句与条件状语从句的区别。
考情分析通常在单项选择、完形填空或补全、完成句子等题型中考查。
知能提升（一）知识讲解【认知讲解】I. if引导的宾语从句if 引导宾语从句时，意思为：是否，从句的时态通常要和主句保持一致。
【例句】I want to know if he lives there. 我想知道他是否住在那儿。
He asked me if I could help him. 他问我是否能帮他。
【考查点】if、whether引导的宾语从句的区别1. if或whether引导宾语从句时，作“是否”讲，常放在动词ask、see、say、know和find out等后面。
一般情况下，两者常可换用，在口语中多用if。
【例句】Nobody knows whether / if it will rain tomorrow.没有人知道明天是否下雨。
Lucy asked whether / if they had a cotton sweater.露西问他们是否有棉制的毛衣。
2. if或whether引导宾语从句时，要注意三个方面，即连词、语序和时态。
if或whether既不能和that 或其他连词（副词）同时使用，也不能省略。
【例句】我不知道他今天是否会来。
[误] I don’t know that if(whether) he will come here today.[正] I don’t know if(whether) he will come her e today.他走过来看看猫是否出了毛病。
[误] He came to see what if (whether) there was anything wrong with his cat .[正] He came to see if (whether) there was anything wrong with his cat .if或whether引导宾语从句时，虽具有疑问的意义，但其从句应用陈述句的语序。
if引导的条件状语从句和宾语从句
If的用法if 的条件从句分为真实条件从句和虚拟条件从句。
真实条件从句：真实条件从句适用于主将从现，是假设有可能发生的。
一．位置在if 引导的条件状语从句中，既可以放在主句之前，也可以放在主句之后。
若if 条件句放句首，从句后面要加逗号，和主句隔开。
You will catch the bus if you get up early. = If you get up early, you will catch the bus.二．时态1.（主祈从现）主句：一般现在时态（包含祈使句和含有情态动词can, may, must等的句子）从句：一般现在时态2. （主将从现）主句：一般将来时态从句：一般现在时态3.从句:现在进行时，主句:一般将来时If you are looking for Peter you’ll find him upstairs. 如果你是在找彼得，上楼就会找到他。
4．if从句用现在完成时，主句用一般将来时If you have finished dinner I’ll ask the waiter for the bill. 如果你吃完了，我就叫服务生来算账5.if 条件句谈论的是重复发生和预示要发生的情景和事件，则主从句大多用一般现在时态。
如：If bears are in danger ,they attack people.三．注意事项1.在if 引导的条件状语从句中，当主句是一般将来时态时，不能使用be going to 结构，而要用will.2.在if 引导的条件状语从句中,不能使用some,而要用any.四．同义句转化1.借助于祈使句+an d∕or+简单句转化，and表示顺承，or表示转折。
例如：(1)If you work hard, you’ll pass the exam.Work hard, and you’ll pass the exam.(2)If you do n’t hurry up, you’ll be late.Hurry up, or you’ll be late.2.借助于介词with或者without 来转换例如：If you help me, I’ll finish my job soon.With your help , I’ll finish my job soon.if 条件句不一般,几个要点记心间条件句,放在前,逗号要放句中间。
- 1、下载文档前请自行甄别文档内容的完整性，平台不提供额外的编辑、内容补充、找答案等附加服务。
- 2、"仅部分预览"的文档,不可在线预览部分如存在完整性等问题,可反馈申请退款(可完整预览的文档不适用该条件!)。
- 3、如文档侵犯您的权益，请联系客服反馈,我们会尽快为您处理(人工客服工作时间：9:00-18:30)。
英语每日一练——if引导宾语从句和条件状语从句的区别
【考点分析】宾语从句是9AU2和U3重点语法，状语从句是9AU4-7的重点语法，都是中考的重点。
而if引导的条件状语从句是我们从初一就开始接触的。
把if引导的两种从句结合考查，能够直接反映出学生对复合句的掌握情况，成为近几年模拟考试的趋势。
【典型例题】
1.---I'm wondering if you __________ to my party tomorrow evening.
--- I will surely attend your party if I __________ free then. (2018郑外9A10月月考)
A. will come; am
B. come; will be
C. will come; will be
D. come; am
【易错点】
1.分辨不出宾语从句和状语从句
2.混淆宾语从句和状语从句的时态规则
【解题方法】
1）翻译句子：---我想知道你是否参加来我明晚的聚会。
---如果我那时有空，我一定会去的。
2）判断从句：问句中if翻译成是否，则引导宾语从句；答句中if翻译成如果，则引导条件状语从句。
3）判断时态：宾语从句时态原则“主过从必过，主现从不限，真理永不变。
”问句中主句是一般现在时，宾语从句时态不受限制，按照句意而定。
根据关键词tomorrow evening，应该用一般将来时，所以排除BD选项。
条件状语从句时态原则“主将从现”，答句中主句是一般将来时，状语从句用一般现在时，所以排除C。
综合分析本题选A
【练习巩固】
1. --- Bill, do you know if Shawn __________ to Christmas party this Friday?
--- He will make it if his flight from New York __________ in Xiamen on time. (2019厦门9A期中模拟)
A. comes; arrives
B. comes; will arrive
C. will come; arrives
D. will come; will arrive
2. --- I wonder if you __________ to go swimming.
--- I'm not sure. But I will tell you if my father __________ to let me join you. (2017南京育英二外U3单元测)
A. will be allowed; will agree
B. are allowed; will agree
C. will allow; will agree
D. will be allowed; agrees
3. --- I don’t know if I __________ to her birthday party next Sunday. If I __________, I will be happy.
--- Oh, yes. I bought it in a store on the Internet. (2017西安第一中学9A期中)
A. will invite; invite
B. invite; will invite
C. will be invited; will be invited
D. will be invited; am invited
【答案解析】
1.【答案】C
1）翻译句子：---你知道肖恩这周五是否会来参加圣诞派对吗？---他会来的，如果他的航班准时从纽约到厦门。
2）判断从句：问句中if翻译成是否，则引导宾语从句；答句中if翻译成如果，则引导条件状语从句。
3）判断时态：宾语从句时态原则“主现从不现”问句中主句是一般现在时，宾语从句时态不受限制，按照句意而定。
根据关键词this Friday，应该用一般将来时，所以排除AB选项。
条件状语从句时态原则“主将从现”，答句中主句是一般将来时，条件状语从句用一般现在时，所以排除D。
2.【答案】D
1）判断主被动：问句中的you和选项中的allow应该是被动关系，你被允许去游泳。
因此排除C选项。
2）翻译句子：---我想知道你是否会被允许去游泳。
---我不确定。
但是如果我爸爸同意我加入你们，我会告诉你的。
3）判断从句：问句中if翻译成是否，则引导宾语从句；答句中if翻译成如果，则引导条件状语从句。
4）判断时态：宾语从句时态原则“主现从不现”问句中主句是一般现在时，宾语从句时态不受限制，按照句意而定。
句意中你被允许去游泳这件事还没发生，应该用一般将来时，所以排除B 选项。
条件状语从句时态原则“主将从现”，答句中主句是一般将来时，条件状语从句用一般现在时，所以排除A选项。
综合分析本题选D
3.【答案】D
1）判断主被动：句中的I和选项中的invite应该是被动关系，我被邀请去生日派对。
因此排除AB选项。
2）翻译句子：---我不知道下周日我是否会被邀请去她的生日派对。
如果我被邀请，我会很开心。
3）判断从句：第一句中if翻译成是否，则引导宾语从句；第二句中if翻译成如果，则引导条件状语从句。
4）判断时态：宾语从句时态原则“主现从不现”第一句中主句是一般现在时，宾语从句时态不受限制，按照句意而定。
根据关键词next Sunday，应该用一般将来时。
条件状语从句时态原则“主将从现”，第二句中主句是一般将来时，条件状语从句用一般现在时，所以排除C选项。