由if引导的条件状语从句用法
If引导条件状语从句的详细用法解答
If引导条件状语从句的详细用法解答引导条件状语从句最常用的连词是if,常见的if条件状语从句表示在某条件下,某事很可能发生,条件是可能存在的,主句中某种情况发生的概率也是很高的。
如:If you ask him,he will help you.如果你请他帮忙,他会帮你的。
If you fail in the exam,you will let him down.如果你考试不及格,你会让他失望的。
If you have finished the homework,you can go home.如果你作业做完了就可以回家了。
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,也就是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。
如: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,我本会来得早一些。
另外你还要注意if 条件句的时态搭配1.if从句用一般现在时,主句用一般将来时If he runs he’ll get there in time. 如果他用跑的,他就会及时赶到那儿。
The cat will scratch you if you pull her tail. 如果你拉猫的尾巴,它就会抓你。
2.if从句用一般现在时,主句用may/might/canIf the fog gets thicker the plane may/might be diverted. 如果雾在大一些,飞机可能就会改在别的机场降落。
If it stops snowing we can go out. 如果雪停了,我们就可以出去。
3.if从句用一般现在时,主句用must/shouldIf you want to lose weight you must/should eat less bread. 如果你想减肥,你必须少吃面包。
高三复习-if引导的条件状语从句用法
if引导的条件状语从句用法if引导的状语从句,通常我们可以叫条件状语从句,注意一下它的时态非常自然的一种结构,然后我们读熟一个例句就好了。
If it rains tomorrow,I will not go。
If是一个连词,作为连词后面常常会引导一个句子,这个句子就是状语从句。
例句If it rains tomorrow,I will not go,如果明天下雨我就不会去。
这个条件状语从句叫做主将从现,主语用将来时,从句用一般现在时。
注意:在if的条件状语从句中,主句为下列情形之一时,if条件状语要用一般现在时。
1.主句是一般将来时(主将从现)例如:If he comes, he will tell me all.如果他来了,他会告诉我所有(的事情)。
(这个知识点在初中阶段是常考题,简称“主将从现”——主句是一般将来时态,从句是一般现在时态。
本句中主句是由will引导的一般将来时态的句子,从句是由if引导的一般现在时态的句子,符合主将从现的法则。
)2.主句是含有情态动词may/might/can/must/should等句子。
例如:If you want to lose weight, you must eat less bread.如果你想减肥,你必须少吃面包。
(主句中含有情态动词must,所以if引导的条件状语从句要用一般现在时态。
)3.主句是祈使句例如:If you are not strong enough, please dont take part in such an activity.如果你不够强壮,请不要参加这种活动。
(主句是一个Do型的祈使句,所以根据原则,if从句要用一般现在时态。
)。
If引导的条件状语从句
If引导的条件状语从句很多英语学习者都觉得If引导的条件状语从句这个句型很难,学习起来很吃力。
下面是店铺为你整理的If引导的条件状语从句的相关资料,希望大家喜欢!If引导的条件状语从句用法1.if引导的条件状语从句可以放在主句之前,也可以放在主句之后,如果放在主句之前,中间要用逗号将主句和从句隔开。
例如:If I am free, I will come to see you.= I will come to see you if I am free.如果我有空,我就来看你。
2. 在含if引导的条件状语从句的复合句中,主句用一般将来时,从句通常用一般现在时态表示将来意义,即“主将从现”原则。
例如:If it snows tomorrow, we will go skiing.如果明天下雪,我们就去滑雪。
3. 在含if引导的条件状语从句的复合句中,语句的谓语还可含有情态动词can、must、may等,主句也可是祈使句。
例如:If it stops raining, we can go out.如果雨停了,我们就能出去。
4. 在含if引导的条件状语从句的复合句中,如果主句部分描述的是客观事实或真理,要用一般现在时。
例如:If you heat the ice, it turns into water.如果你加热冰,它就会变成水。
if引导的非真实条件句对过去的虚拟条件从句(if):主语+had done 主句might/would/should/could+have done对现在的虚拟if+ 主语+动词过去式(be用were)主句might/would/should/could+do对将来的虚拟if+主语+动词过去式(be用were)或主语+should do或主语+were to do主句 might/would/should/could+doe.g.Tom got to the station in time because he started earlier.If Tom had started late, he would have missed the train.Do you think the thief entered through the door?No, if he had, I don't believe, he would have broken the living room window.If the book weren't so expensive, I would buy it.If you didn't live so far away, we would be able to visit you more.What would you do if you lost your passport in a foreign country?Why hasn't he come? If he should not come on time, we would have to put off the trip.2.注意事项e.g.If she hadn't work hard at English in the past, she wouldn't work as well as a secretary in a large company now. 混合时间的虚拟语气从句为对过去的虚拟,主句是现在。
if引导的条件状语从句
if引导的条件状语从句(一)概念if连词的意思是“如果”,它引导的句子表示某事发生所需要的条件,在句子中充当状语,因此我们称之为条件状语从句,在复合句中的连词引导的句子为从句。
从句可以放在主句后也可以放在主句前。
从句放在主句前时,应用逗号将它与主局隔开。
例如:If it doesn't rain tomorrow ,we'll go to the Great Wall .We'll go to the Great Wall if it doesn't rain tomorrow .=(二)if引导的条件状语从句的用法1,如果主句为一般将来时,if引导的条件状语从句的用法通常为一般现在时。
例如If he doesn't go hiking tomorrow, I won't either . 如果他明天不去徒步旅行,我也不会去。
He'll go with us ,if he is free tomorrow. 如果他明天有空,他蒋和我们一起去。
2,当主句中含有情态动词等时can may must,从句常用一般现在时。
例如.You must hurry if you want to go swimming with us .如果你想要和我们一起去游泳就必须快一点。
You can stay here if you like . 你如果愿意可以留在这儿。
3,当主句为祈使句时,那么从句也常用一般现在时。
例如;If Mr Green leaves for HONGKong tomorrow ,Please let me know .如果格林先生明天启程去香港,请让我知道。
Come and play with me if you have time on Sunday .如果你星期天有空,来和我一起玩。
Please call me if you have questions .如果你有任何问题请给我打电话。
if引导的条件状语从句用法
if引导的条件状语从句用法
1.如果主句是将来时态,从句只能用一般现在时态或用表示将来的“be going to”结
构。
如:
If he wins top prize, he will be knighted. 如果他能赢得最高奖,他将被封为爵士。
2.如果主句是祈使句,从句通常要用一般现在时态。
如:
Don’t be late if you want to go to the lecture. 如果你想参加讲座,请不要迟到。
3.如果主句是现在完成时态,从句必须用现在完成时态的相应时态。
如:
I will not go to the party if I have finished my homework. 如果我的作业写完了,
我不会去参加晚会的。
4.如果if引导的从句主语和主句主语相同,从而省略了主语的话,if引导的从句还
可以倒装,必须把从句的be动词放在if的位置。
如:
If more attention was given to the development of primary and secondary schools here, students now would not have to seek educational opportunities elsewhere.
如果这里中小学发展得到更多关注的话,现在学生就不必到其他地方寻找求学的机会了。
if 引导条件状语从句
if 引导条件状语从句
摘要:
1.条件状语从句的定义
2.if 引导条件状语从句的语法结构
3.if 引导条件状语从句的用法和实例
正文:
条件状语从句是用来表示一个条件,即如果某个条件成立,那么就会发生某个结果。
在英语中,条件状语从句通常由if 引导。
语法结构:
if + 条件从句(主语+ 谓语+ 其他成分)
主句(主语+ 谓语+ 其他成分)
if 引导条件状语从句的用法和实例:
1.肯定句中的条件状语从句
If it is hot, we will go to the beach.(如果天气热,我们将去海滩。
)
2.否定句中的条件状语从句
If it is not hot, we will go to the park.(如果天气不热,我们将去公园。
)
3.一般疑问句中的条件状语从句
Will you help me if I need your help?(如果我需要你的帮助,你会帮助我吗?)
4.特殊疑问句中的条件状语从句
What will you do if you win the lottery?(如果你中彩票,你会做什么?)
通过以上实例,我们可以看到if 引导条件状语从句在各种句子类型中的用法。
初中英语If引导的条件状语从句(可编辑修改word版)
初中英语――if 引导的条件状语从句在if 引导的条件状语从句中,if 和条件句位置灵活,可直接放在主句后面,若if 条件句放句首,从句后面要加逗号,和主句隔开。
还要注意前后时态一致原则.引导条件状语从句的连接词主要有:if(如果)、unless(除非)或as long as(只要)等。
unless 在意思上等于if...not。
一、条件状语从句用法1、引导条件状语从句最常用的连词是if,由if 引导的条件状语从句表示在某种条件下某事很可能发生。
如:If you ask him, he will help you.如果你请他帮忙,他会帮你的。
If you fail in the exam, you will let him down.如果你考试不及格,你会让他失望的。
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,也就是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。
如: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。
2、unless = if...not. 除非,若不,除非在……的时候例如:Let's go out for a walk unless you are too tired.=If you are not too tired, let's go out for a walk.Unless it rains, the game will be played.除非下雨,比赛将照常进行。
二、时态问题在条件状语从句中,要注意“主将从现”的规定,即主句用一般将来时,从句用一般现在时表示将来时。
例句:I will come to see you if I have time.我有时间,我就来看你。
三如果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。
总结好的:if引导的条件状语从句
总结好的:if引导的条件状语从句if引导的条件状语从句if1) ⽤法:(1)条件状语从句通常由连词if引导,意为“如果、假如”,主句不能⽤be going to表⽰将来,⽽应该⽤shall,will。
If you leave now, you are never going to regret it. (错误)If you leave now, you will never regret it. (正确)(2)if “如果”,引导条件状语从句,主句⽤⼀般将来时,从句则⽤⼀般现在时,如:If it rains tomorrow, I shan’t climb the hills.(3)另外,主句是祈使句或含有情态动词,从句也⽤⼀般现在时。
如:Please call me if he comes next Sunday.Can you call the policeman if you are in the trouble.注意宾语从句中的if与条件状语从句if的区别。
宾语从句中的if“是否”相当于whether,引导宾语从句,时态需根据语境确定。
如果主句⽤⼀般现在时,从句可以根据具体情况选⽤时态,如果主句⽤⼀般过去时,从句必须⽤过去式的某种形式。
I don't know if it will rain tomorrow. 我不知道明天是否会下⾬。
Our teacher said there was going to be a football match the next month.我们说下⽉将有场⾜球⽐赛。
【边学边做】⽤括号内所给词的正确形式填空。
1. What will you buy if you ________(have)a lot of money?2. If it ________(not snow)tomorrow, we will feel unhappy.3. You mustn’t go to school if you ________(be)still in bed.4. If he _______(be)at home at that time, he would know it.5. Please show me the way if you ________(know)it.6. You will hurt your teeth if you ________(eat)too much candy.7. If you gave me a toy car, I _________(be)very happy.8. I would get the prize if I _________(work)hard.9.If she ______ (finish ) work early ,she ______(go) home.10.If the weather______(be)fine,we_______(go)for a walk .11. If I_____(have) time tonight ,I _______(finish) the book I’m reading.12. If it ______(rain) next weekend , we_______(not be able to ) plant the vegetable .13. If it_______(rain),we______(stay) at home .14.If she______(arrive) ,she _____(phone) me .15. If he_____(call),tell him I’ll ring back .⼆、⽤所给词的适当形式填空1. If you ________(feel) tired, you _________ (have) to have a rest.2. Where _____ he ____(see) the film if he _________(have) 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 Peking University.⼆、完成句⼦1. 他如果看电视太久了,他的⽗母会不⾼兴。
if引导的条件状语从句的用法
考点剖析条件状语从句是同学们经常接触到的句型。
其中,由if 引导的条件状语从句出现的频率较多。
同学们在学习if 引导的条件状语从句时,可以从位置、时态以及同义句转化三个方面入手。
文章将结合具体实例进行分析,希望能够帮助大家轻松应对这一句型。
一、if 引导的条件状语从句的位置首先,我们要了解这一从句的位置是怎样的。
if 引导的条件状语从句既可以位于主句之前,也可以放在主句之后。
假如从句放在前面,那么从句与主句之间就用逗号分隔。
结构1:“主句+if 引导的条件状语从句”。
例如:I will go to a movie with you if I ’m free this after-noon.如果我下午有空,我将和你一起去看电影。
结构2:“if 引导的条件状语从句+主句”。
例如:If I ’m very busy this Friday ,I won ’t have dinner with you.如果我本周五很忙,我不会跟你共进晚餐。
二、if 引导的条件状语从句的时态if 引导的条件状语从句,主、从句时态是相互呼应的。
一般会有以下几种情况:1.如果主句是一般现在时,那么从句也应该是一般现在时。
一般现在时包括含有情态动词must ,may ,can 等的句子。
例如:You must apologize to me if you break an appoint-ment.如果你失约了,你必须跟我道歉。
If you want to go out and play ,you have to get Mom ’s permission.如果你想出去玩,你就必须得到妈妈的同意。
2.如果主句是一般将来时,从句必须用一般现在时。
例如:If you apologize to him ,he will be very moved.如果你跟他道歉,他会很感动的。
If you get up late ,you will miss the bus.如果你起晚了,你就赶不上公交车了。
If引导条件状语从句的详细用法解答
I 【2 】f引诱前提状语从句的具体用法解答引诱前提状语从句最常用的连词是if,常见的if前提状语从句表示在某前提下,某事很可能产生,前提是可能消失的,主句中某种情形产生的概率也是很高的.如:If you ask him,he will help you.假如你请他帮忙,他会帮你的.If you fail in the exam,you will let him down.假如你测验不合格,你会让他掉望的.If you have finished the homework, you can go home.假如你功课做完了就可以回家了.别的,if从句还表示不可实现的前提或基本不可能消失的前提,也就是一种虚拟的前提或假设.从句多用一般曩昔时或曩昔完成时,表示对如今或曩昔的一种假设.如:If I were you,I would invite him to the party.假如我是你,我会邀请他参加聚首.I would have arrived much earlier if I had not been caught in the traffic.要不是交通堵塞,我本会来得早一些.别的你还要留意if 前提句的时态搭配1.if从句用一般如今时,主句用一般未来时If he runs he’ll get there in time. 假如他用跑的,他就会实时赶到那儿.The cat will scratch you if you pull her tail. 假如你拉猫的尾巴,它就会抓你. 2.if从句用一般如今时,主句用may/might/canIf the fog gets thicker the plane may/might be diverted. 假如雾在大一些,飞机可能就会改在别的机场下降.If it stops snowing we can go out. 假如雪停了,我们就可以出去.3.if从句用一般如今时,主句用must/shouldIf you want to lose weight you must/should eat less bread. 假如你想减肥,你必须少吃面包.4.if从句用一般如今时,主句用一般如今时If you heat ice it turns to water. (也可用will turn)假如把冰加热,它就会化成水. 5.if从句用如今进行时,主句用一般未来时If you are looking for Peter you’ll find him upstairs. 假如你是在找彼得,上楼就会找到他.6.if从句用如今完成时,主句用一般未来时If you have finished dinner I’ll ask the waiter for the bill. 假如你吃完了,我就叫办事生来算账留意:进修" if " 引诱的前提状语从句的用法,如今总结一下:if 前提句不一般,几个要点记心间;前提句,放在前,逗号要放句中央.前提句表可能,主句多用未来时;前提句表事实,主句常用如今时.在 if 引诱的前提状语从句中,假如从句谈论的是一个有可能产生的事实及其产生的相干的成果,主句用一般未来时态,从句用一般如今时态.如:We can walk there if we can't find a bus .If it rains tomorrow ,we will not go to the zoo.What will you do if you find a panda in danger.假如 if 前提句谈论的是反复产生和预示要产生的情景和事宜,则主从句大多用一般如今时态.如:If bears are in danger ,they attack people.在 if 引诱的前提状语从句中,if 和前提句地位灵巧,可直接放在主句后面,若 if 前提句放句首, 从句后面要加逗号,和主句离隔.还要留意前后时态一致原则。
初中if引导的条件状语从句用法
初中if引导的条件状语从句用法条件状语从句用于表示一个条件或前提,它通常由if引导。
条件状语从句通常指的是未来可能发生的事情,它与主句之间存在因果关系。
条件状语从句的基本结构是“if +条件句子,主句”。
其中条件句子可以是陈述句、祈使句或者问句。
例如:-如果你学习努力(条件句子),你会取得好成绩(主句)。
-倘若明天下雨(条件句子),我们就不去度假(主句)。
-要是他来了(条件句子),请告诉他我会晚点到(主句)。
以下是一些拓展用法:1.构造虚拟条件句子:虚拟条件句子用来表达与现实相反的假想情况。
主句的情态动词常常是“would”,而条件句中的动词需使用过去时态。
例如:-如果我有足够的钱(条件句子,现在假设),我就会买一辆新车(主句)。
-如果我能回到过去(条件句子,现在不可能),我会改变很多事情(主句)。
2.使用倒装结构:如果条件句以“had”或是“were”开头时,可以使用倒装结构。
例如:- Had I known you were sick(条件句子),I would have visited you(主句).- Were I taller(条件句子),I could reach the top shelf (主句).3.使用“unless”表示否定条件:除了使用“if”之外,我们也可以使用“unless”来引导否定条件状语从句。
例如:- Unless you study hard(条件句子),you won't pass the test(主句).- We won't have a picnic(主句)unless it stops raining (条件句子).总之,条件状语从句用于表示可能发生的条件情况,其语法结构为“if +条件句子,主句”。
拓展用法包括虚拟条件句子、倒装结构和使用“unless”来表示否定条件。
if引导的条件状语从句的用法
(3)假设
真的,或者有可能成为真的;
(二)假设将来,假设的条
将来
件是将来可能实现的。
1. if 非真实条件句(虚拟)——假设现在
(二)遵循的原则
should do
might+do
例 7 If I _____(be) a bird,I would fly to you right
状态,是正在玩球的意思,
所以此空填 is playing。
3. if 引导的真实条件状语从句——假设将来
例 3 If it _____(rain) tomorrow,we will stay at home.
解析:如果你不想受伤,
就不要玩刀。根据 Don’
t
play with the knife,主句是祈使句,所以从句为 if 引导
to the park.
he will take me to the park,主句用的一般将来时,而且
可以分析出,他哥哥现在还没有回,所以从句为 if 引
导的表将来的条件状语从句。根据“主将从现”的原
则,此空填 comes。
2. if 非真实条件句(虚拟)——假设过去
例8
Years ago if someone_____ (turn) round to
批改学生作文时,遇到拼写错误较多的学生可以这样
及各个时代相关代表作品的赏析,感受中西方文化的
评价:
不同,提高其审美水平;在进行人教版(2014)高中英
neat and tidy!
学生参观学校的科学实验室或者本地的科技馆,感受
1. 认 同 欣 赏:I like your handwriting,which is so
if引导的条件状语从句
if引导的条件状语从句if引导的条件状语从句是中考中常考的知识点,我们一起来学习一下它的具体用法吧!一、连接词ifif是引导条件状语从句的连接词,表示主句中动作发生的条件。
还是看看具体例子吧!If you get up early, you will catch the bus.如果你早起的话,就能赶上那班公共汽车。
You must see the doctor if you are ill.如果你生病了,就必须去看医生。
二、if引导的条件状语从句的构成构成方式为:“主句+if引导的条件状语从句”或“if引导的条件状语从句+主句”。
在含有条件状语从句的复合句中,如主句在前,从句在后,主从句之间不用标点;如要强调从句的内容,则把从句放在主句的前面,这时主从句之间要用逗号隔开。
例如:I will go to his birthday party if he invites me.=If he invites me, I will go to his birthday party.三、if引导的条件状语从句的时态在一般情况下,如果主句谓语动词表示将来的意义,从句谓语动词用一般现在时表将来。
常见的有以下几种:1. 主句是一般将来时。
例如:You will be late for school if you get up late.如果你起晚了,上学将会迟到。
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。
2. 主句的谓语动词是want, hope, wish等词。
例如:I hope to visit her if I'm free.如果我有空,我希望去拜访她。
3. 主句的谓语动词含can, may, must等情态动词。
例如:If I finish my homework, I can watch TV.如果我完成了家庭作业,就可以看电视。
If引导条件状语从句的用法
◆if引导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。
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。
◆if引导的条件状语从句使用须知:一、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。
例如: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。
二、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。
例如: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 warmclothes.如果你想去滑冰,穿上暖和点的衣服。
一.选择正确答案。
1. It was raining heavily___ we got to Paris.A. whileB. ifC. whenD. because2. I don’t know if ___ tomorrow.A. it doesn’t rainB. the rain will stopsC. the rains won’t stopD. it won’t rain3. The volleyball match will be put off if it___ .A. will rainB. rainsC. rainedD. is raining4. Difficulties are nothing if we ___ not afraid of themA. willB. shallC. areD. do5. We ___ Beijing t omorrow if it doesn’t rain.A. are going toB. wouldC. shallD. will go6. I don’t like to be interrupted if I___ .A. speakB. will speakC. am speakingD. spoke7. If you ___ the book you will understand the story better.A. will be readingB. have readC. will have readD. read8. If you ___ I will go with youA. go toB. wentC. willD. should go9. I’ll go to meet you,if I ___ free then.A. would beB. will beC. amD. was10. If you ___ to the music, buy a CD.A. will listenB. listenC. listeningD. listened11. He suggested ___ a picnic tomorrow.A. to haveB. havingC. haveD. to having12. Be careful, if you ___ want to make mistakes.A. won’tB. don’tC. didn’tD. not13. Work hard if you __ _ to get a good mark.A. wantedB. wantingC. wantD. will want14. I want to know if you___ to the party tomorrow.I will if I___ free.A. will come; amB. come; amC. will come; will beD. come; will be15. The cat ___ him___ the hand.A. bit; inB. bited; onC. bit; onD. bited; on16. There is going to ___ a sports meeting next week. If it ___ , we’ll have to cancel it..A. be; will rainB. have; will rainC. be; rainsD. give; is going to rain17. If he ___ , I ___ go swimming alone.A. doesn’t come will goB. won’t come; will goC. will come; w on’t goD. is coming; don’t go18. If you ___ a chance to study in a foreign country, just take it.A. gettingB. had gotC. will getD. get19. Frank ___ a film if he’s free next Saturday.A. seeB. sawC. has seenD. will see20. If he ______ exercise, he ___ healthy.A. not; willB. isn’t; won’t beC. doesn’t; will beD. doesn’t do; won’t be21.I don't know if he___ tomorrow.If he ___ ,I'll tell you.A.will come;comes B.comes;comesC.comes;will D.is coming;is coming22.If you _____ to the party, you’ll have a great time.A. will goB. wentC. goD. going23. It will be a long time ____ Peter _____ his work. A. since, has finishedB. after, finishesC. when, will finishD. before, finishes.24. What will father _____ us from Japan?A. takeB. bringC. carryD. make25. Weifang is famous ______ kites.A. forB. toC. onD. with26.I ____ her the answer if she ____me.A. can tell, will askB. will tell, will askC. would tell, askD. will tell, asks27. –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 rain28.—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 come29. What will you do if you _____ to the old folk’s home visit?A. goB. wentC.goingD. will go30. If I eat ____ food, I’ll be very fat.A. too manyB. many tooC. too muchD. much too31. I’ll give the book to him if he ___ here next Sunday.A. will comeB. comesC. is comingD. came32. There ____an English film in our school tomorrow.A. is going to haveB. will haveC. is going to beD. has33. 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 held34. When my mother returned last night, I ____ a book.A. readB. am readingC. was readingD. am going to read35.What ____ you ____ when it began to rain?A. do, doB. were, doingC. are, doingD. did, do36. I’ll wake you up when he ____back.A. willB. is going to comeC. comesD. come二.在正确的答案下划一条线。
if引导的条件状语从句用法
if引导的条件状语从句用法
条件状语从句是由if引导的从句,用于表达条件的情况。
在使用
条件状语从句时,需要注意以下几点:
1.结构:条件状语从句一般由if引导,后面跟着主句。
主句可以
通过if从句的情况来说明结果或者后果。
例子:If it rains, we will stay indoors.(如果下雨,我们
就会呆在室内。
)
2.时态:如果条件状语从句描述的是将来的情况,通常将来时态
在条件从句中使用,而在主句中使用一般将来时。
例子:If you study hard, you will pass the exam.(如果你
努力学习,你就会通过考试。
)
3.虚拟语气:在条件状语从句中,如果描述的是与事实相反或不
可能实现的假设,通常使用虚拟语气。
例子:If I were rich, I would buy a big house.(如果我有钱,我就会买一栋大房子。
)这里的"If I were"是对现实情况的假设。
拓展:
除了用于条件从句中,if还经常用于其他类型的从句,如时间状
语从句(if引导的时间状语从句常用于表示"每当"或"如果"的意思)、方式状语从句(if引导的方式状语从句可以表示一种条件或介绍某种
方式,例如"If possible"表示"如果可能的话")等。
总结好的:IF引导的条件状语从句
if引导的条件状语从句if条件句:条件句用于陈述语气,表示假设的情况可能发生,其中if 是“如1) 用法:(1)条件状语从句通常由连词if引导,意为“如果、假如”,主句不能用be going to表示将来,而应该用shall,will。
If you leave now, you are never going to regret it. (错误)If you leave now, you will never regret it. (正确)(2)if “如果”,引导条件状语从句,主句用一般将来时,从句则用一般现在时,如:If it rains tomorrow, I shan’t climb the hills.(3)另外,主句是祈使句或含有情态动词,从句也用一般现在时。
如:Please call me if he comes next Sunday.Can you call the policeman if you are in the trouble.注意宾语从句中的if与条件状语从句if的区别。
宾语从句中的if“是否”相当于whether,引导宾语从句,时态需根据语境确定。
如果主句用一般现在时,从句可以根据具体情况选用时态,如果主句用一般过去时,从句必须用过去式的某种形式。
I don't know if it will rain tomorrow. 我不知道明天是否会下雨。
Our teacher said there was going to be a football match the next month.我们说下月将有场足球比赛。
【边学边做】用括号内所给词的正确形式填空。
1. What will you buy if you ________(have)a lot of money?2. If it ________(not snow)tomorrow, we will feel unhappy.3. You mustn’t go to school if you ________(be)still in bed.4. If he _______(be)at home at that time, he would know it.5. Please show me the way if you ________(know)it.6. You will hurt your teeth if you ________(eat)too much candy.7. If you gave me a toy car, I _________(be)very happy.8. I would get the prize if I _________(work)hard.9.If she ______ (finish ) work early ,she ______(go) home.10.If the weather______(be)fine,we_______(go)for a walk .11. If I_____(have) time tonight ,I _______(finish) the book I’m reading.12. If it ______(rain) next weekend , we_______(not be able to ) plant the vegetable .13. If it_______(rain),we______(stay) at home .14.If she______(arrive) ,she _____(phone) me .15. If he_____(call),tell him I’ll ring back .二、用所给词的适当形式填空1. If you ________(feel) tired, you _________ (have) to have a rest.2. Where _____ he ____(see) the film if he _________(have) 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 inPeking University.二、完成句子1. 他如果看电视太久了,他的父母会不高兴。
if引导的条件状语从句
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(loseweight),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。
Key:
1. Ifitdoesn’traintomorrow, I willhave a picnic with myclassmates.
③主句为祈使句,if从句用一般现在时态。
Don’t jump into the river if you feel very hot.如果你感到很热,不要跳入河里。
④主句为过去将来时,if从句用一般过去时态(如果涉及到be动词,一律都用were)。此时,表达的是和现实相反的推测,用虚拟语气。
If I were you, I wouldn’t do it like that.
如果我是你,我就不会那么做的。
If you gave me some money, I would be very happy.如果你给我一些钱,我就会很高兴的。
【边学边做】用括号内所给词的正确形式填空。
1.Whatwill you buy ifyou ________(have)alotofmoney?2.Ifit ________(notsnow)tomorrow, wewill feel unhappy.3.Youmustn’tgoto schoolif you________(be)stillin bed.4.If he _______(be)at home at thattime, hewould know it.5. Pleaseshowmethe wayif you ________(know)it.6. Youwill hurt yourteethif you ________(eat)too muchcandy.7.If yougave meatoycar, I_________(be)veryhappy.8. Iwould getthe prizeifI_________(work)hard.
If引导的条件状语从句的用法
If引导的条件状语从句的用法“If”的具体用法一. “If”引导的宾语从句的用法Step1:从句具备的两个条件:(1)有引导词.(2)引导词后面有完整的句子.Step2:宾语从句的含义:宾语从句在复合句中作主句的(及物动词或介词)的宾语. Step3: 句型结构:主语+及物动词(v t)+引导词+主语+谓语(+其它)主句宾语从句主句谓语动词引导词宾语从句译文:永远不要谴责你不了解的事情.操练句子的八大步骤:第1步:首先搞清每个单词的含义和词性.第2步:语法现象分析.分清句子主要结构和成分. 按照主要句子对应成分进行朗读1遍. 第3步:意群划分.按照意群朗读至少3遍.第4步:单词读准.一定确保把句子当中的每个单词读标准和地道,这是学习英语的重中之重,一定不可忽略,为整体句子朗读做好准备和铺垫.每个单词至少朗读3遍.第5步:按照意群朗读细则:首先听原声录音,一个一个句子读顺,先慢速朗读3遍,然后中速3遍,最后快速3遍,把句子操练熟练后,利用李阳疯狂英语核心理论方法,“三最口腔训练法”和“一口气训练法”.第6步:中英翻译互换训练练习.细则:组织学员进行两两中英互换练习.一个说中文,一个说英文,然后再互换角色. 第7步:复述练习.细则:找两位学员进行现场复述训练和现场翻译训练第8步:默写练习.Step4:“if”引导宾语从句的特点:(1)“if” 有含义,表示“是否”.(2)不可省略. E g: 主语状语谓语引导词宾语从句译文:我只是想知道今晚她是否来参加我的生日宴会.Step5: “If”引导的宾语从句的用法与“whether” 引导的宾语从句的用法的两点区别.(1)若句末没有出现“or not”, 两者可以互换(.2)若句末出现“or not”, 只能用“whether”. E g: (两者皆可)主句引导词宾语从句比较:I don’t know whether my parents can come to the class meeting or not.(只能用“whether”)二. “if”引导真实条件状语从句的用法Step1: 条件状语从句具备4大语法意义(1):状语从句在句中起状语作用,修饰主句的整个句子.(2):状语从句通常有从属连词引导,与主句相接.(3):状语从句放在句首时,常用逗号与主句隔开;若放在句末,其前一般不用逗号.(4):条件状语从句分为从句和主句,引导词后面表示可能的句子为从句,而另外一个表示结果的句子为主句.Step2: “If” 引导真实条件状语从句的特点:(1)从句的谓语动词用一般现在时态.(2)主句的谓语动词用一般将来时态,或者用情态动词:“may/ might+动词原形.3大句式:第1大句式:If + simple present, subject +will/won’t +动词原形.引导词从句主句译文:有闲论是非,无暇爱他人.练习题:1, A: gained B: have gained C: will gain2, get married, you will have more free time.A: didn’t B: don’t C: doesn’t第2大句式:If + simple present, subject +may/might+动词原形.E g: 引导词从句主句Explain: We can also use may and might as consequences, to show that the consequence is less likely.译文:如果你拥有更多的空闲时间,你或许会感到无聊.第3大句式:If + simple present, subject +will+be able to+动词原形或will +have to+动词原形.E g: 引导词从句主句译文:如果你节省一些钱,你就能去旅游. 引导词从句主句译文:如果你去外国旅游,你得获得签证.Explain : We can not say will can or will must. Instead, we say“will be able to+动词原形” and “will have to+动词原形”.三. “if”引导非真实条件状语从句的用法,即虚拟语气.Step1: 虚拟语气的语法意义:“表示说的话不是事实,或者不可能发生,实现的可能性不是很大,只是一种愿望,假设或者猜想,从句和主句的谓语动词用一种特殊形式.(一)..表示对将来情况的一种假设.特点:A: 从句的谓语动词(1)一般过去时态(2)should+动词原形.(3)were to+动词原形. B: 主句的谓语动词用would/could/should/ might +动词原形.从句动词形式主句动词形式译文:如果明天下雨的话,我就待在家里.(二).表示对现在和目前情况的一种假设.特点:A: 从句的谓语动词用一般过去时态,“be”动词一律用“were”. B: 主句的谓语动词用would/could/should/ might /ought to+动词原形.从句动词形式主句动词形式译文:不经历风雨怎么见彩虹.几种特殊句式:第1特殊句式: If I were you, I would +动词原形. 假如我是你的话,我会-------- E g: If I were you, I would talk to my boss first译文:假如我是你的话,我会首先和我的老板谈谈.If I were you, I would change my current job.译文:假如我是你的话,我会换掉我目前的工作.第2特殊句式:What would you do if----------------------------? 假如-----------------你会怎么办? E g: What would you do if you were in my shoes?译文:假如你站在我的立场,你会怎么办?What would you do if you got fired?译文:假如你被炒鱿鱼,你会怎么办?第3特殊句式:What would happen if -----------? 假如/倘若------将会出现何种结果呢? E g: What would happen if we combined animal genes with human genes?译文:如果我们把动物的基因与人的基因交织组合在一起,将会出现什么样的结果呢?What would happen if we lost touch with each other?译文:倘若我们彼此都失去联系,将会变成什么样的结果呢?(三).表示对过去情况的一种假设.特点:A: 从句的谓语动词用过去完成时态即:“had+过去分词”. B: 主句的谓语动词用would/could/should/might/ought to +现在完成时态即“have +过去分词”.E g: If I 从句时态形式主句动词形式译文:要是我早知道你在北京的话,我会带你游览这座城市的. 从句时态形式主句动词形式译文:要是我当时多加小心的话,我会做的更加出色.练习题he had not hurt his leg, John would have won the race (2019全国)A: Since B: If C: Though D: Whenhere last Saturday, he 全国). A: had been; would have prevented B: had been; would preventC: Were; would prevent D: were; would have prevented3. If the workers hadn’t2019北京)A: would have failed B: had failed C: fail D: have failed.4. A: If he 全国)B: Luckily he was sent to the hospital immediately.A: was warned B: had been warned C: would be warned D: is warned(四)虚拟语气中“if”的省略倒装现象特点:省略从句中的“if”,只需把系动词或者助动词提到主语前即可,主句保持不变. 基本句式:“Should/ were/had +主语+部分谓语”.E g: If you were in my position , you would do the same.倒装现象:Were you in my position , you would do the same.E g: If I had been in a good mood then, I would have gone to the movies.倒装现象:Had I been in a good mood then, I would have gone to the movies.练习题:1, I in good health, I with you.(2019福建)A: Am; will go B: Were; would go C: was ; shall go D: were; were going2, for the doctor’s careful treatment, he till last year.(2019山东)A: If is not; can’t live B: Were it not; couldn’t liveC: Had it not been; couldn’t have lived D: If they were not; couldn’t live3. it rain tomorrow , we would have to put off the visit to the memorial.(2019安徽) A: Were B: Should C: Would D: Will4, A: Would you be B: Should you be C: Could you be D: Might you be.(五)“If”引导虚拟语气的错综时间.特点:(1)从句的时间与主句所表示的时间不一致.(2)从句和主句的动作不是发生在同一时间,具体动词形式要根据时间而定.两种特殊情况:(1)若从句表示的是过去,谓语动词用过去完成时态,即:“had +过去分词”,主句表示的是现在,谓语动词用could/would/should+动词原形. 表示的是过去表示的是现在译文:要是他当时吃药的话,他现在感觉更好一些.(2)若从句表示的是现在,谓语动词用一般过去时态;主句表示的是过去,谓语动词用情态动词加现在完成时态,即:“would/ could /should have +过去分词”. 表示的是现在表示的是过去译文:如果我知道他的电话号码的话,我就给他打电话了。
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W
hat would you do if it was yours? Etc.
Help the students to answer :I would
buy a pair ቤተ መጻሕፍቲ ባይዱf shoes.
3.
指出虚拟条件句
:If +
主语
+did(were),
主语
’
ll tell you .
A. will come comes B. comes comes C. comes will D. is coming is coming
( ) 4. If I _____a lot of money , I ______a big house at once .
A. have buy B. had would buy C. had bought D. have am buying
主语
+would + do. I would give it to charity.
3.hundred / thousand/ million give it go medical research
put it in the bank
学生学习活动评价设计
测试评价:单项选择
( )1. If I _______ a teacher, I would be strict with my students
), I would read a book.
教学过程
(教学过程的表述不必详细到将教师、学生的所有对话、活动逐字记录,但是应该把主要教学环
节、教师活动、学生活动、设计意图很清楚地再现。)
Step1 Greeting
Step2
Warming-up
Step3 1a
Step4
Listening (1b)
Step5 Pair-work
and then memory the
phrases.
Listen for the
target language
Discuss what they
would do if ......in
pairs.
Present their
conversations.
To review if
引导
的真实条件句。
引出话题,导
;
thousand
( )6. I don
’
t think it _______snow tomorrow .
A. does B. is going C. will D. would
( )7. He asked me if I ______help him.
A. can B. will C. am going to D. could
出虚拟语气。
学习一些新的
词组和短语。
提高听力
提高口语技能
巩固知识
Unit4 What would you do ?
1.
真实条件句:主将从现
If will you do if it rains after school?
2.
虚拟语气:
If +
主语
+did(were), What would you do if you had a million dollars?
( ) 5. The school is very big , there are two ______teachers there , and it has ______students.
A. hundreds thousands B hundred thousands of C. hundreds thousands of D. hundred
+would + do.
小结本节课的主要内容。
Answer
the
questions.
复习回顾
IF
引导
的真实条件句。
学习虚拟语气
比较虚拟语气和真实条
件句的不同。
Think of the things
they would do if they
had a lot of money.
Add more items to 1a
教学目标
1知识目标:掌握虚拟语气的结构并能运用,学会用虚拟语气谈论一些假设的虚拟的情况。
2能力目标:培养学生根据情景发挥想像的能力,进行发散思维训练。
3情感、态度和价值观:通过本节课
,
激发学生对社会的关注
,
增强奉献意识
,
使学生形成积极的情感态度
,
教学重点和难点
1虚拟语气的结构和运用(
If+
主语
+did(were),
Step6 Summary
Ask
: How are you today?
How
’
s the weather today?
What are you going to do after school?
What will you do if it rains after school?
If
引导的真实条件句时态:主将从现
主语
+ would + do.
What would you do if you had a million dollars?
I’d give the money to charity
If I were you, I’d
take a small present.
2虚拟语气与真实条件句的区别。
If it rains thisweekend, I will stay at home. If it rained now事实上现在没下雨
我们以前学习过由if引导的真实条件句,学生对条件状语从句有了个大概的认识,但从教学反馈来看,学生对真实条件句的时态(主将从现)把握并不是很好。这一节内容,围绕
What would you d o if you had a million dollars?
展开想像,这是一个轻松的话题,学生也感兴趣,因此教学中要充分利用话题调动学生积极性,使学生多操练,然后进行归纳和总结。更全面比较真实条件句和虚拟语气的区别。在教学中,学生可能比较难把握的是什么是真实条件什么是百真实条件,对虚拟语气的时态也会难以适应,教学中要多强调。
。
A. am B. was C. were D. will be
( ) 2. I will go to meet you , if I ______free then .
A. would be B. will be C. am was
( ) 3. I don
’
t know if he _______ tomorrow . If he ______, I