初中英语语法——If引导的条件状语从句(讲解及练习)(汇编)

初中英语――条件状语从句（讲解&练习）

Ⅰ条件状语从句的定义

Ⅱ条件状语从句的引导词

1.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。

If we pay much attention to the earth, we'll have a better world.

如果我们多关爱地球，就会拥有一个更美好的世界

If it rains tomorrow, what shall we do?

如果明天下雨，我们怎么办？

注意：if还可以引导虚拟条件句，表示不可实现的条件，从句中多用一般过去时或过去完成时。

What would happen if there were no water ?

如果没有水会怎样？

2.unless引导的条件状语从句

unless的意思是如果不，除非。可与if...not互换。

You will fail in English unless you work hard.

你英语考试会不及格的，除非你更加努力。

3.as /so long as引导的条件状语从句

as /so long as意思是“只要”

So long as you're happy,i will be happy.

只要你高兴，我就高兴。

Ⅲ条件状语从句的种类

Ⅳ条件状语从句的时态原则

注意：

学习" 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。

条件句表真实，主将从现要遵从；

条件句非真实，虚拟语气用到位。

练习

Ⅰ.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. What will you do i f you _____ to the old folk’s home?

A. go

B. went

C. going

D. will go

（）5．I’ll give the book to him if he ___ here next Sunday.

A. will come

B. comes

C. is coming

D. came

Ⅱ.用所给词的适当形式填空

6..If you ________(feel) tired, you _______________ (have) to have a rest.

7. Where _______ he _________(see) the film if he ________________(have) time?

8. If there __________(be) fewer trees, there _______________( be) more pollution.

9. If Marcia _____________(live) alone, she ___________________( keep) a pet parrot.

11. Lana ________________( buy) a new dress if the old one ____________(be) out of style.

12.The twins ______________(fight) if they_______________(argue).

13. I ____________(have) a bake sale if I _____________(need) money for education.

14. Peter _____________( send) me a beautiful souvenir if he ________________(tour) Spain.

15. I ____________(go) to the beach if it________________ ( not rain) this week.

17. __________they __________( have) a match if the P.E. teacher _____________(be) busy?

18. If she ____________(get) up late, she _____________ ( not catch) the early bus.

Ⅲ.翻译下列句子

19..如果他到的晚了会发生什么事情？

What _______________ if he _____________ late?

20. 如果努力学习，你就会取得好成绩。

If you__________ _________, you good marks.

21. 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.

22. 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. 23. 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.

24. 如果她睡过头了，就会旅游迟到的。

She;__________________________ the trip if she ___________________.

25. 如果他有空，他会帮助你的。

If he _________________, he _________________ you.

26. 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 ________high school if he ________ the exams.