八年级英语 if条件状语从句+巩固练习

2) whether替换法：if引导宾语从句时，其意为“是否”，通常可用whether替换，意义不变，而if引导条件状语从句时不能用whether替换。因此，可用whether替换的是宾语从句，不能替换的是条件从句。例如：

I want to know if you will go tomorrow. = I want to know whether you will go tomorrow.

我想知道你明天是否去。

注意：区分if的用法有着极为重要的意义，因为在条件状语从句中，主句用将来时，从句用一般现在时；而在宾语从句中，当主句是一般现在时，从句可用所需的任何时态，主句是一般过去时，从句用过去的某种时态。

巩固练习

一、单项选择

1. If you _____ to the party, you’ll have a great time.

A. will go

B. went

C. go

D. going

2. 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

3. — 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

4. — 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

5. I’ll give the book to him if he ____________ here next Sunday.

A. will come

B. comes

C. is coming

D. came

6. There ____________ an English film in our school tomorrow.

A. is going to have

B. will have

C. is going to be

D. has

7. I’ll wake you up when he ____________back.

A. will

B. is going to come

C. comes

D. come

8. The football match will be put off if it ________.

A. will rain

B. rains

C. rained

D. is rained

9. There ________ a basketball game this afternoon.

A. is going to have

B. will be

C. is going to play

D. will play

10. I won’t go if it ________ tomorrow.

A．rain

B．is raining

C．rains

D．will rain

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 ________ (go) to 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) not 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.

三、完成句子

1.如果他迟到了，会发生什么事情？

What _______ ________ if he _______ late?

2. 如果努力学习，你就会取得好成绩。

If you_______ _______, you _______ _______ good _______.

3. 他如果看电视太久了，他的父母会不高兴。

If he _______ TV too much, his parents _______ _______ unhappy.

4. 如果我们为他举办生日聚会，大家都会来的。

Everyone _______ _______ if we _______a birthday party _______ him.

5. 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.

6. 如果她睡过头了，就会误了开会的。

She _______ _______ _______ _______ the meeting if she _______ _______.

7. 如果他有空，他会帮助你的。

If he _______ _______, he _______ _______ you.

8. 如果Tom考试不及格，他就没有机会上高中了。

Tom _______ miss the chance to go to the high school if he _______ the exams.

9. 你如果抄同学的作业就不能学好各门功课。

You _______ _______ good at all the subjects if you _______ the other students’ homework.

参考答案

一、单项选择。

1. C。本题是if引导的条件状语从句，主句用一般将来时，从句用一般现在时，即“主将从现”，所以答案为C。

2. D。根据句意“如果她问我，我就告诉她答案。”可知本句是if引导的条件状语从句，主句用一般将来时，从句用一般现在时，从句的主语为单三，动词后加-s，所以答案为D。

3. D。条件状语从句，主句用一般将来时，从句用一般现在时，rain在此是实义动词“下雨”的意思，故答案为D。

4. A。根据“主将从现”可知本句答案为A。此题是when引导的时间状语从句。

5. B。根据“主将从现”可知答案为B。

6. C。be going to do，will do都可以表示将来的动作，但只有选项C符合There be句型要求。

7. C。根据“主将从现”可知答案为C。

8. B。根据“主将从现”可知答案为B。

9. B。本题考查there be句型的一般将来时，there will be，故答案为B。

10. C。根据“主将从现”可知答案为C。

二、用所给词的适当形式填空

1. feel; will 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; need

9. will send; goes

10. says; will feel

11. will go; doesn’t rain

12. Will; have; is

13. will write; gets

14. gets; won’t catch

15. will major; passes

三、完成句子

1. will happen; is

2. study hard; will get; grades

3. watches; will be

4. will come; have; for

5. doesn’t rain; will; with

6. will be late for; sleeps late

7. has time; will help

8. will; fails 9. won’t be; copy

end

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