if条件状语从句 语法
if 条件状语从句
if引导的条件状语从句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:一,第一类:1)表示普遍真理和客观事实:If you heat ice ,it melts .If you pour oil on water,it floats.不受时间限制的自然法则的条件句,主句,从句都是一般现在时。
2)表示习惯性的动作If I make a promise , I take it .If it rains ,I go to work by car.表示一个现在习惯性的动作,主句和从句的谓语动词都是一般现在时。
3)表示过去的习惯性,经常的动作If it rained,I went to work by car.If I was hungry, I usually had a full meal.主句和从句谓语动词要依据时间来变为一般过去时。
questions and answers :What do you like to drink if you are very thirsty?How many days are there in February it it is a leap year ? Who do people go and see if they get ill ?第二类:If we catch the 10 o’clock train ,we shall (will ,can,may,must ,should ) get there in time .If it is fine tomorrow ,we can have a picnic somewhere.If you wake up before me , give me a call .条件句(从句)用一般现在表示将来,主句用shall 加动词原型或者是祈使句在if 引导的条件状语从句中,如果从句谈论的是一个有可能发生的事实及其产生的相关的结果,主句用一般将来时态,从句用一般现在时态。
if条件状语从句语法
当句末为or not时,引导词只能用whether而不能用if.
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If 与whether 区分
1. I don’t know _____ he will come or not. 与or not 连用只能用whether
2. I don’t care of ______ he is handsome. 介词后只能用whether
3 If she__w__in_s___ (win) the prize ,we _w_i_ll_b__e_(be) happy. 4.If I __d_o_n_’__t _e_at (not,eat )so much ,I _w__il_l _g_e_t__(get) thinner.
5.If you __te_l_l __(tell) them, they __w_o_n_’__t__b_e_li_e_ve(not,believe) you. 6 I __w_i_ll_s_t_a_y_(stay) at home,If it ___ra_i_n_s____( rain). 7.If it _d__o_e_s_n_’__t ___(not,rain) ,I __w__il_l _g_o__( go) out.
5. 以下从句中will不是未来时助动词,而是情态动词。 翻译为“愿意”。
If you will excuse me,I really must go to bed . 假如你能原谅我话,我真要睡觉了。
If you will wait a minute ,I’ll go and tell my mother that you are here .
If you are free this weekend, what will you do ?
(完整版)if条件状语从句_语法
What will I do if it is sunny this weekend?
Part1:If 的用法
1.I want to know if he will go to park with us. 宾语从句 2. We will have a picnic if it doesn’t rain.
3. He wondered ______ to stay here the next week.
与to do 不定式连用只能用whether 4. ____ he will come is not decided.
作主语只能用whether
If 引导条件状语从句
Complete the sentences with the correct form of the words.
If I’m late, _I _w_i_ll__s_a_y_rrow, I_w_i_l_l _w_a_t_c_h__T_V__a_t_h__o_m__e. I won’t__p_la__y_b_a__s_k_e_t_b_a_ll_.
If it _d_o_e_s__n_’t__ra_i_n__ tomorrow,
3. If you boil water, it becomes steam.
4. If you feel tired, you must have a rest. 条件状语从句
语法1:if作为宾语从句 的引导词,引导宾语从 句。(是否)
语法2:if(如果)引 导的条件状语从句
❀ if 用于宾语从句中
当句末为or not时,引导词只能用whether而不能用if.
If 与whether 的区别
1. I don’t know _____ he will come or not. 与or not 连用只能用whether
If引导的条件状语从句
--We’ll go to the library tomorrow if it __D_.
A. isn’t rain B. rain C. won’t rain D.will you do if you _____Ato the old folk’s
home visit?
2. I ____ her the answer if she ____me. A.can Dtell, will ask B. will tell, will ask C. would tell, ask D. will tell, asks
3. – What are you going to do tomorrow?
If 引导条件状语从句的时态为一般现在时
记住“主将从现”
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----Sam, do you know if Alice ____to my party next week?
----I think she will come if she ____ free.
A comes; is B will come; will be C will come; is D comes; will be
If 引导的宾语从句放在主句之后;而if引 导的状语从句可放在主句之前也可放在主 句之后
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1. Can you tell me if she can come to the meeting ?
2. She will not go there if it is rainy tomorrow.
3. I can’t guess if she will be angry . 4. If we help each other , we both will get
条件状语从句语法讲解
条件状语从句语法讲解
条件状语从句主要由if引导:
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“如果”的意思。
1.If it doesn’t rain , I will go to the park tomorrow.
从句主句
2.If you are in trouble , you can ask me for help.
从句主句
3.If you see him tomorrow , give him this book.
从句主句
注意:1.在条件状语从句,主句用一般将来时,从句则不能用一般将来时态,只能用一般现在时态来代替一般将来时态
2.主句含有情态动词或是祈使句时,从句也用一般现在时。
(总之,条件状语从句中不能出现一般将来时态)
习题:判断正误,如有错误,请改正。
1.I don’t now if it will rain tomorrow.
2.If you will excuse me,I will be very happy.
3.If he will come tomorrow ,let me know.
4.If my friend will visit me tomorrow, I can go out with her.。
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主句从句
if引导的条件状语从句主句从句
1. If it rains tomorrow, we will cancel the picnic.
如果明天下雨,我们将取消野餐。
2. I will help you with your homework if you ask me nicely.
如果你好好请求我,我会帮你做作业。
3. If you study hard, you will pass the exam.
如果你努力学习,你就会通过考试。
4. She will go to the party if she finishes her work on time.
如果她按时完成工作,她会去参加聚会。
5. If you don’t hurry, you will miss the bus.
如果你不快点,你会错过公交车。
6. We can go for a hike if the weather is nice.
如果天气好,我们可以去远足。
7. If he apologizes, I will forgive him.
如果他道歉,我会原谅他。
8. You will succeed if you believe in yourself.
如果你相信自己,你会成功。
9. If they invite us, we will definitely attend the wedding.
如果他们邀请我们,我们一定会参加婚礼。
10. If you keep practicing, you will improve your skills.
如果你继续练习,你会提高你的技能。
If引导的条件状语从句
◆结构:if是从属连词,意为“如果”,用来引 导条件状语从句。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。从句位 于主句之前时,常用逗号将其与主句隔开。
If you copy my homework this time, you will start a bad habit. you will start a bad habit if you copy my homework this time
如果红灯亮,你必须停下来等待。
If the traffic lights are red, you must stop and wait.
◆变换:含有if引导的条件状语从句的复合句 中,当主句主语和从句主语均为you时,可转 换为“祈使句,and + 简单句”或“祈使句,or + 简单句”。
You can pass the exam if you work hard.
◆时态:主句用一般将来时 或主句谓语中含情态 动词 (如must, can, should等) 时, if引导的条件状 语从句用一般现在时表示将来意义。 “主将从句”
如果我不懂,我就向老师请求帮助。
I’ll ask the teacher for help if I don’t undersweight),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: •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.
If引导的条件状语从句
5. If you __d_o_n_’_t _w_o_rk___(not work ) hard , you _w_o_n_’_t _p_as_s_(not pass) the exam.
6. If she __m__e_n_d_s_(mend) the computer , her father __w_o_n_’t_b_l_am__e_(not blame ).
1.有if引导的条件状语从句的复合句中,当主句和从句的 主语均为you时,可转换为“祈使句,and+简单句”或
“祈使句,or+简单句” You can pass the exam if you work hard. Work hard ----------------,and you will pass the exam.
If you don't hurry up,you will be late again.
or Hurry up,------ you will be late again.
2. 借助介词with 或without来转换。
例如: If you help me, I’ll finish my job soon.
If引导的条件状语从句
潘店镇中学
if引导的条件状语从句
例句:If people obey the traffic rules, →从句 there will be fewer accidents. →主句
if:从属连词,意思是:“如果,假如,倘若”
: 结构
if引导的条件状语从句既可以放在句子前, 也可以放在句子后。
时态:
if引导的条件状语从句, 主句用一般将来时(will),从句用一般现在时。
→主句谓语中也可以含有情态动词, 如:must,can,could,should等
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主句
if引导的条件状语从句的主句
条件状语从句可以引导不同的主句,具体取决于上下文和语境。
以下是几种常见的情况:
1.主句是肯定句:
- If it rains, I will stay at home. (如果下雨,我会待在家里。
)
- If you study hard, you will pass the e某am. (如果你努力学习,你会通过考试。
)
2.主句是否定句:
- If she doesn't hurry, she will miss the bus. (如果她不赶快,她会错过公车。
)
3.主句是祈使句(命令句):
- If you see him, tell him I'm looking for him. (如果你见到他,告诉他我在找他。
)
- If you have any questions, don't hesitate to ask. (如果你有任何问题,不要犹豫问。
)
4.主句是疑问句:
- If the movie starts at 7, are we meeting at 6? (如果电影7点开始,我们6点见面吗?)
需要注意的是,条件状语从句中的主句可以是各种不同类型的句子,根据具体语境和意义来确定。
同时,主句的动词时态也可能根据需要而变化。
If引导的条件状语从句
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变换:
1.有if引导的条件状语从句的复合句中,当主句和从句的 主语均为you时,可转换为“祈使句,and+简单句”或
“祈使句,or+简单句”
You can pass the exam if you work hard. Work hard ----------------,and you will pass the exam.
for you , it will be good for your study.
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5. If you __d_o_n_’_t _w_o_rk___(not work ) hard , you _w_o_n_’_t _p_as_s_(not pass) the exam.
6. If she __m__e_n_d_s_(mend) the computer , her father __w_o_n_’t_b_l_am__e_(not blame ).
W--i-t-h--y--o-u--r--h--e-l-p-, 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 w--i-th--o--u-t--w--a--t-e-r--. 如果没有水,鱼可能会死。
I won’t go there unless I hear from you.(同义 if 句) don’t
I won’t go there _____ I _____hear from you. I won’t go to the party if I am not invited. (同义 句) unless I won’t go to the party_____ I am invited.
if条件状语从句的三种时态
if条件状语从句的三种时态
if条件句的三种时态类型:
1、主将从现(主句为一般将来时,从句为一般现在时)。
If it rains(从句) ,I will stay at home(主句)=I will stay at home if it rains.
如果下雨(从句),我会待在家里(主句)=如果下雨我将待在家里。
2、主句含有情态动词(must、may、can etc.)从句为一般现在时。
If you drive too fast,you may have an accident.=You may have an accident if you drive too fast.
如果你开得太快,你可能会出事故=如果你开得太快,可能会出事故。
3、主句为祈使句,从句要用一般现在时态。
Dont play computer games if you dont finish your homework.
如果你没有完成作业,就不要玩电脑游戏。
其他条件句:
错综时间条件句:有些条件句的主句谓语和从句谓语表示的动作在时间上并不一致,这类句子称为错综时间条件句(if 条件句是对过去的虚拟,故用过去完成时,而主句是对现在的虚拟,故用“would+动词原形”形式)。
含蓄条件句:
有些句子虽不含条件从句,但意思和条件句相差不多,这种句子称为“含蓄条件句”,这种句子有时候会用虚拟语气。
If引导条件状语从句
Unit 5 If you go to the party,you’ll have a great time!语法1. if条件句2. 现在进行时表示将来的时间一. if条件句1. if”的意思。
2. 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,if从句则用一般现在时,主句用一般将来时。
如:If it rains tomorrow, I shan’t climb the hills.If I go to college, I will never become a great soccer player.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。
I don't know if it will rain tomorrow. 我不知道明天是否会下雨。
()1.If you _____ to the party, you’ll have a great timeA. will goB. wentC. goD. going()2.–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 rain()3. What will you do if you _____ to the old folk’s home visit?A. goB. wentC. goingD. will go()4. If I eat ____ food, I’ll be very fat.A. too manyB. many tooC. too muchD. much too()5. I’ll give the book to him if he ___ here next Sunday.A. will comeB. comesC. is comingD. came()6. I ____ her the answer if she ____me.A. can tell, will askB. will tell, will askC. would tell, askD. will tell, asks()7. We’ll go to the farm and help the farmers with the apple-picking if it ____ tomorrow.A. won’t rainB. will be rainyC. doesn’t rainD. isn’t raining()8. There is going to _______ a sports meeting next week. If it ________, we’ll have to cancel it. A. be, will rain B. have, will rain C. be, rains()9. Your teacher will be unhappy if you _______ to school late. A. come B. will come C. are coming D. came()10.I don’t know if he __. If he __ , please let me know. A. comes, comes B. will come, will come C. will come, comes D. comes, will come()11.You will stay healthy _______ you do more exercise, such as running and walking.A. ifB. howC. beforeD. where()12.If she here tomorrow, I will tell you.A. comesB. will comeC. comeD. came()13. I’m waiting for my friend., I’ll go shopping alone.A. If she comesB. If she doesn’t comeC. If she won’t come()14. —Tom wants to know if you will have a picnic tomorrow.—Yes. But if it ______, we’ll play chess instead.A. will rainB. rainedC. is rainingD. rains()15. If Tom _____ the game, we'll give him a surprise". A. win B. wins C. won D. miming二. 现在进行时表示将来的时间1. 用be doing表示将来:主要意义是表示按计划、安排即将发生的动作,常用于位置转移的动词,如:go,come,leave,arrive等,也可用于其他动作动词,如:We are having fish for dinner. 我们晚饭吃鱼。
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引导条件状语从句的两种用法
if引导条件状语从句的两种用法“主将从现”和表事实时用现在时
在百度知道回答别人问题时突然发现个人总是忽略第二点特意在此总结下
" if " 引导的条件状语从句的用法,现在总结一下:
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。
在if 引导的条件状语从句中,如果从句谈论的是一个有可能发生的事实及其产生的相关的结果,主句用一般将来时态,从句用一般现在时态。
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.
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。
如:
If bears are in danger ,they attack people.
注意:
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。
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。
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2. Ask him _w_h_e_t_h_e_r_(_i_f)_h__e_c_a_n_c_o_m__e. (他是否能来) 3. I didn’t know _w_h_e_t_h_e_r_i_t_w_a_s__g_o_in_g__t_o_r_a_i_n_o_r_n.(ot是否要下雨
)
当句末为or not时,引导词只能用whether而不能用if.
If 与whether 的区别
1. I don’t know _____ he will come or not. 与or not 连用只能用whether
2. I don’t care of ______ he is handsome. 介词后只能用whether
(not,send) her away 10.He w__il_l _w_a_t_c_h_(watch) TV ,if he ___is___(be) free.
exercises
(B )1. Be careful, if you______ want to make mistakes.
A. won’t B. don’t C. didn’t D. not
_I’_ll_p_l_a_y_b_a_s_k_e_t_b_a_ll_.
If it is sunny this weekend, what will you do ?
If it is sunny this weekend, I __w_i_ll_p_l_a_y__ football with my classmates.
play computer games
if条件状语从句(2)
句子特点: 1.if从句中用一般现在时,表示未来的一种条件, 从句中可以加时间状语。 2.当if表示未来的条件时,主句中用一般将来时。 句型结构: 主句+if条件状语从句 if条件状语从句,+主句(从句后加逗号)
3.时态:if一般现在时,+主句一般将来时或 (can/ may /must +v.)
1.If he__d_o_e_s_n_’t_d__o__ (not, do it ), I___w_i_ll_d_o____(do) it. 2.If you _a_r_e_ (be) late for school ,my teacher _w__il_l _b_e__(be) angry.
3 If she__w__in_s___ (win) the prize ,we _w_i_ll_b__e_(be) happy. 4.If I __d_o_n_’t_e_a_t_ (not,eat )so much ,I _w__il_l _g_e_t__(get) thinner.
如果你愿意等一会的话,我去告诉我妈妈你来了。
试比较下列句子: If you see him tomorrow ,give him this book . 如果你明天去看他,给他这本书。 If you will see him tomorrow ,give him this book . 如果你明天愿意去看他,给他这本书。
1.If you __li_s_te_n__(listen) to the music, _b_u_y__ (buy) a CD.
2. If he___is___ (be) late for school,d_o_n_’t_w__ait
(not wait ) for him.
3. If you _b_u_y_ (buy) a new camera, __g_et_ (get)
a good one.
4. If the light _d_o_e_s_n_’t__co_m__e_ (not come) on, _w__a_it (wait) for one minute.
If 条件状语从句(1)
句型结构
祈使句+if条件状语从句 if条件状语从句,+祈使句(从句后加逗号)
时态
3. He wondered ______ to stay here the next week.
与to do 不定式连用只能用whether 4. ____ he will come is not decided.
作主语只能用whether
If 引导条件状语从句
Complete the sentences with the correct form of the words.
Look and say
If I’m hungry,
I will_e_a_t_s_o_m__e__fo_o_d__.
If I’m tired,
I will__h_a_v_e_a__r_e_s_t __.
Look and say
If I’m ill, _I_w_i_l_l _s_e_e__a_d_o__c_to__r_.
果不早点起床,上学就会迟到。
2. If I play games on it , it will go wrong .
如果我用它玩游戏,它就会坏掉。
3. If you finish the homework, you can go home. 如果你作业做完了就可以回家了。
4. If you want to lose weight you must/should eat less bread. 如果你想减肥,你必须少吃面包。 5.If you heat ice it turns to water. (也可用will turn) 如果把冰加热,它就会化成水。
Hale Waihona Puke If I’m late, _I _w_i_ll__s_a_y_s__o_r_ry____.
If it rains tomorrow, I_w_i_l_l _w_a_t_c_h__T_V__a_t_h__o_m__e. I won’t__p_la__y_b_a__s_k_e_t_b_a_ll_.
If it _d_o_e_s__n_’t__ra_i_n__ tomorrow,
If you finish your homework , you can go out and play. If I have enough money next year , I will go to travel .
5. 下列从句中的will不是将来时助动词,而是情态动词。 6. 翻译为“愿意”。 If you will excuse me,I really must go to bed . 如果你能原谅我的话,我真的要睡觉了。 If you will wait a minute ,I’ll go and tell my mother that you are here .
3. If you boil water, it becomes steam.
4. If you feel tired, you must have a rest. 条件状语从句
语法1:if作为宾语从句 的引导词,引导宾语从 句。(是否)
语法2:if(如果)引 导的条件状语从句
❀ if 用于宾语从句中
If it is sunny this weekend, I__________.
If it is sunny this weekend, what won’t you do ?
If it is sunny this weekend, I _W__o_n_’_t _s_ta_y__a_t_h_o_m__e____.
if条件句歌诀
❖ 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。 ❖ if条件句有特点,现在时把将来替; ❖ 这个规则要牢记!
e.g.
1.If you don’t get up early, you will be late for school .你如
If it is sunny this weekend, I _w__o_n_’_t _w_a_t_c_h_t_e_le_v_i_s_io_n__.
practice
If you are free this weekend, what will you do ?
sleep
If I am free ,… watch TV
5.If you __te_l_l __(tell) them, they __w_o_n_’_t_b__e_li_e_ve_ (not,believe) you. 6 I __w_i_ll_s_t_a_y_(stay) at home,If it ___ra_i_n_s____( rain). 7.If it _d__o_e_s_n_’t_r_a_i_n_(not,rain) ,I __w__il_l _g_o__( go) out. 8. we _w__il_l _p_la_y___(play) football, If it is s_u__n_n_y____(sun) . 9.If she _b_e_c_o_m__e_s__(become) a star ,her parents __w_o_n_’_t_s_e_n__d_
3. 如果主句是祈使句,从句同样要用一般现在时。
Don’t go and play football if you don’t finish your homework.
Please call me if he comes next Sunday.
4.表示假设,表示将会发生和可能发生的事,
或进行提醒警告。 If +句子(一般现在时),+主句(主语will/may/can) +动词)
if条件状语从句要用一般现在时。
What will you do if you’re happy?
❖ If I’m happy, I will _cl_a_p_m__y_h_a_n_d_s_. ❖ If I’m happy, I will _s_ta_m__p_m__y_f_e_e_t . ❖ If I’m happy, I will _n_o_d_m__y_h_e_a_d__. ❖ If I’m happy, I will __w_i_n_k_m__y__e_y_e_s_.