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 warm

clothes.

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. while B. if C. when D. because 2. I don’t know if ___ tomorrow.

A. it doesn’t rain B. the rain will stops C. the rains won’t stop D. it won’t rain 3 . The volleyball match will be put off if it___ . A. will rain B. rains C. rained D. is raining 4. Difficulties are nothing if we ___ not afraid of them A. will B. shall C. are D. do 5. We ___ Beijing tomorrow if it doesn’t rain.

A. are going to B. would C. shall D. will go 6. I don’t like to be interrupted if I___ .

A. speak B. will speak C. am speaking D. spoke 7. If you ___ the book you will understand the story better. A. will be reading B. have read C. will have read D. read 8. If you ___ I will go with you

A. go to B. went C. will D. should go 9. I’ll go to meet you，if I ___ free then.

A. would be B. will be C. am D. was 10. If you ___ to the music, buy a CD.

A. will listen B. listen C. listening D. listened 11. He suggested ___ a pinic tomorrow.

A. to have B. having C. have D. to having 12. Be careful, if you ___ want to make mistakes. A. won’t B. don’t C. didn’t D. not 13. Work hard if you ___ to get a good mark. A. wanted B. wanting C. want D. will want 14. I want to know if you___ to the party tomorrow. I will if I___ free.

A. will come; am B. come; am C. will come; will be D. come; will be 15. The cat ___ him___ the hand.

A. bit; in B. bited; on C. bit; on D. bited; on

16. There is going to ___ a sports meeting next week. If it ___ have to cancel it..

A. be; will rain B. have; will rain C. be; rains D. give; is going to rain 17. If he ___ , I ___ go swimming alone.

A. doesn’t come will go B. won’t come; will go C. will come; won’t go D. is coming; don’t go

we’ll, 18. If you ___ a chance to study in a foreign country, just take it. A. getting B. had got C. will get D. get 19. Frank ___ a film if he’s free next Saturday. A. see B. saw C. has seen D. will see 20. If he ______ exercise, he ___ healthy. A. not; will B. isn’t; won’t be

C. doesn’t; will be D. doesn’t do; won’t be

21．I don't know if he___ tomorrow．If he ___ ，I'll tell you． A．will come；comes B．comes；comes C．comes；will D．is coming；is coming 22.If you _____ to the party, you’ll have a great time. A. will go B. went C. go D. going

23. It will be a long time ____ Peter _____ his work. A. since, has finished B. after, finishes C. when, will finish D. before, finishes. 24. What will father _____ us from Japan? A. take B. bring C. carry D. make 25. Weifang is famous ______ kites. A. for B. to C. on D. with

26． I ____ her the answer if she ____me. A. can tell, will ask B. will tell, will ask C. would tell, ask D. will tell, asks 27. – What are you going to do tomorrow? --We’ll go to the library tomorrow if it ____. A. isn’t rain B. rain C. won’t rain D. doesn’t rain 28.—Do you know when he will come back tomorrow? --Sorry, I don’t know. When he ____ back, I’ll tell you. A. comes B. will come C. come D. may come

29. What will you do if you _____ to the old folk’s home visit? A. go B. went C.going D. will go 30. If I eat ____ food, I’ll be very fat.

A. too many B. many too C. too much D. much too

31. I’ll give the book to him if he ___ here next Sunday. A. will come B. comes C. is coming D. came 32. There ____an English film in our school tomorrow.

A. is going to have B. will have C. is going to be D. has 33. Could you tell us where ____？ A. will the next Olympic Games held B. the next Olympic Games will be held C. would the next Olympic Games be held D. the next Olympic Games would be held

34. When my mother returned last night, I ____ a book. A. read B. am reading C. was reading D. am going to read 35.What ____ you ____ when it began to rain? A. do, do B. were, doing C. are, doing D. did, do 36. I’ll wake you up when he ____back.

A. will B. is going to come C. comes D. come 二．在正确的答案下划一条线。

1.Daina ( will go/go/goes) to Europe if she (will pass/pass/passes) the exams .

2. The graduates (will teach/teach/teaches) in the poor village if the Ministry of Education (will agree/ agree/agrees) soon.

3. If there (will be/ are/is) a car accident, they (will call/call/calls) 110 for help at once.

4. If it (won’t/don’t/doesn’t/ isn’t) rainy, we (will take/ take/takes) walk outside.

5. If a UFO (will land/land/lands) in front of me, I (will go/go/goes) in to look for the alien.

6. If he (will have/have/has) money, he (will bulid/build/builds) a science lab.

7.Don’t wait for me if I (am/ will be) late.

8.They (won’t/don’t) go to the beach if it (will rain/rain /rains). 9. I (will call/ call) you if he (will stay/stay /stays) at home.

10. Mr Smith (will let/ let/lets) you know if he (will need/ need/ needs) help.

11. (Will / Do/ Does) he visit the museum if he (won’t / don’t/ doesn’t) get tired?

12. Where (will/ do/does) they live if they (will miss/ miss/ misses) the bus?

三、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).

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