初中英语语法——If引导的条件状语从句(讲解及练习).doc

WORD格式-专业学习资料-可编辑 初中英语条件状语从句（讲解&练习）条件状语从句的定义 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, well 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 youre happy,i will be happy.只要你高兴，我就高兴。条件状语从句的种类条件状语从句的时态原则条件句从句主句真实一般现在时一般将来时情态动词+动原祈使句非真实一般过去时be动词用（were）would/could+动原注意 ：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 .单项选择（ ）1.If you _ to the party, youll 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? -Well go to the library tomorrow if it _. A. isnt rain B. rain C. wont rain D. doesnt rain（ ）4. What will you do if you _ to the old folks home?A. go B. went C. going D. will go（ ）5Ill give the book to him if he _ here next Sunday.A. will come B. comes C. is coming D. came.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.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，