初中英语——If引导的条件状语从句注意练习

1、初中英语if引导的条件状语从句（注意&练习）在句子中做条件状语的从句称为条件状语从句。可置于句首、句尾，有时还可置于主语和谓语之间。引导条件状语从句的连接词有：if ,unless,as/so long as等 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

2、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。4.once

3、引导的条件状语从句once引导的条件状语从句，意为“一旦.，就”，从句可置于主句前或后Once you begin,never stop.一旦开始，就绝不要停止Maths is easy to learn once you understand the rules.一旦你理解了规则，数学就不难学了。提示：在条件状语从句中，用一般现在时代替一般将来时，用一般过去时代替过去将来时。If the weather is bad next week, we'll put off the climbing.如果下周天气不好，我们将推迟爬山。Father told me if i worked ha

4、rd he would buy me a gift.爸爸告诉我，如果我努力学习，他会给我买一份礼物。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。 条件句表可能，主句多用将来时； 条件句表事实，主句常用现在时。在 if 引导的条件状语从句中，如果从句谈论的是一个有可能发生的事实及其产生的相关的结果，主句用一般将来时态，从句用一般现在时态。如： We can walk there if we can't find a bus . If it rains tomorrow ,we

5、 will not go to the zoo. What will you do if you find a panda in danger.如果 if 条件句谈论的是重复发生和预示要发生的情景和事件，则主从句大多用一般现在时态。如： If bears are in danger ,they attack people.在 if 引导的条件状语从句中，if 和条件句位置灵活，可直接放在主句后面，若 if 条件句放句首， 从句后面要加逗号，和主句隔开。还要注意前后时态一致原则if 条件状语从句的时态练习 一在正确的答案下划一条线。1.Daina ( will go/go/goes) to Eu

6、rope 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 (wont/dont/doesnt/ isnt)

7、 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.Dont wait for me if I (am/ will be) late.8.They (wont/dont) go to the beac

8、h 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 (wont / dont/ doesnt) get  tired?12. Where (will/ do/does) they live if

9、 they (will miss/ miss/ misses) the bus?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)

10、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 _(tour) Spain.10. If Mr Green _(say) I am hard- working, my pa

11、rents _( 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) 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 Engl

12、ish if he _(pass) the exams in Peking  University.15.如果他到的晚了会发生什么事情？What _ if he _ late?16. 如果努力学习，你就会取得好成绩。If you_ _, you _ good _.17. 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.18. 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.19. 如果明天不下雨，我会和你一

13、起去公园的。  If it _  _ tomorrow, I _ go to the park _ you.20. 如果她睡过头了，就会旅游迟到的。 She;_ the trip if she _.21. 如果他有空，他会帮助你的。If he _, he _  you.22. 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.23. 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 y

14、ou _ the other students homework. .单项选择（15分）1.If you _ to the party, youll have a great time. A. will go  B. went  C. go   D. going2. It will be a long time _ Peter _ his work. A. since, has finished   B. after, finishes   C. when, will finish   D. b

15、efore, finishes.3. What will father _ us from Japan? A. take   B. bring   C. carry   D. make 4. Weifang is famous _ kites. A. for   B. to   C. on   D. with5 I _ her the answer if she _me. A. can tell, will ask   B. will tell, will

16、 ask  C. would tell, ask   D. will tell, asks6. 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 rain7.Do you know when he will come back tomorrow?-Sorry, I dont know. When he _ back,

17、Ill tell you. A. comes  B. will come   C. come   D. may come 8. What will you do if you _ to the old folks home visit?A. go   B. went   C.going   D. will go9. If I eat _ food, Ill be very fat.A. too many   B. many too   C. to

18、o much  D. much too10. Ill give the book to him if he _ here next Sunday.A. will come   B. comes   C. is coming    D. came11. There _an English film in our school tomorrow.A. is going to have  B. will have   C. is going to be   D. has12. Could you tell us wh