初中英语语法If引导的条件状语从句(讲解及练习)

2023-12-18 10:30:34 文档大全网 [ 字体：小中大 ] [ 阅读： ]

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状语,从句,英语,语法,讲解
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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

条件句从句主句

一般将来时

真实一般现在时情态动词+动原

祈使句

一般过去时非真实 would/could+动原

be动词用（were）

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。

立身以立学为先，立学以读书为本

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 if 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?