（推薦）初中英語(yǔ)-If引導(dǎo)的條件狀語(yǔ)從句

1、 初中英語(yǔ)if引導(dǎo)的條件狀語(yǔ)從句在句子中做條件狀語(yǔ)的從句稱(chēng)為條件狀語(yǔ)從句?？芍糜诰涫?、句尾，有時(shí)還可置于主語(yǔ)和謂語(yǔ)之間。引導(dǎo)條件狀語(yǔ)從句的連接詞有：if ,unless,as/so long as等 1.if引導(dǎo)的條件狀語(yǔ)從句 表示在某種條件下某事很可能發(fā)生。 If we pay much attention to the earth, well have a better world. 如果我們多關(guān)愛(ài)地球，就會(huì)擁有一個(gè)更美好的世界 If it rains tomorrow, what shall we do? 如果明天下雨，我們?cè)趺崔k？ 注意：if還可以引導(dǎo)虛擬條件句，表示不可實(shí)現(xiàn)的條件，從

2、句中多用一般過(guò)去時(shí)或過(guò)去完成時(shí)。What would happen if there were no water ?如果沒(méi)有水會(huì)怎樣？2.unless引導(dǎo)的條件狀語(yǔ)從句unless的意思是如果不，除非。可與if.not互換。You will fail in English unless you work hard.你英語(yǔ)考試會(huì)不及格的，除非你更加努力。3.as /so long as引導(dǎo)的條件狀語(yǔ)從句 as /so long as意思是“只要”So long as youre happy,i will be happy.只要你高興，我就高興。4.once引導(dǎo)的條件狀語(yǔ)從句once引導(dǎo)的條件狀語(yǔ)

3、從句，意為“一旦.，就”，從句可置于主句前或后Once you begin,never stop.一旦開(kāi)始，就絕不要停止Maths is easy to learn once you understand the rules.一旦你理解了規(guī)則，數(shù)學(xué)就不難學(xué)了。提示：在條件狀語(yǔ)從句中，用一般現(xiàn)在時(shí)代替一般將來(lái)時(shí)，用一般過(guò)去時(shí)代替過(guò)去將來(lái)時(shí)。If the weather is bad next week, well put off the climbing.如果下周天氣不好，我們將推遲爬山。Father told me if i worked hard he would buy me a gift

4、.爸爸告訴我，如果我努力學(xué)習(xí)，他會(huì)給我買(mǎi)一份禮物。注意 ：學(xué)習(xí) if 引導(dǎo)的條件狀語(yǔ)從句的用法,現(xiàn)在總結(jié)一下: if 條件句不一般,幾個(gè)要點(diǎn)記心間; 條件句,放在前,逗號(hào)要放句中間。 條件句表可能，主句多用將來(lái)時(shí)； 條件句表事實(shí)，主句常用現(xiàn)在時(shí)。在 if 引導(dǎo)的條件狀語(yǔ)從句中，如果從句談?wù)摰氖且粋€(gè)有可能發(fā)生的事實(shí)及其產(chǎn)生的相關(guān)的結(jié)果，主句用一般將來(lái)時(shí)態(tài)，從句用一般現(xiàn)在時(shí)態(tài)。如： We can walk there if we cant find a bus . If it rains tomorrow ,we will not go to the zoo. What will you do i

5、f you find a panda in danger.如果 if 條件句談?wù)摰氖侵貜?fù)發(fā)生和預(yù)示要發(fā)生的情景和事件，則主從句大多用一般現(xiàn)在時(shí)態(tài)。如： If bears are in danger ,they attack people.在 if 引導(dǎo)的條件狀語(yǔ)從句中，if 和條件句位置靈活，可直接放在主句后面，若 if 條件句放句首， 從句后面要加逗號(hào)，和主句隔開(kāi)。還要注意前后時(shí)態(tài)一致原則if 條件狀語(yǔ)從句的時(shí)態(tài)練習(xí) 一在正確的答案下劃一條線。1.Daina ( will go/go/goes) to Europe if she (will pass/pass/passes) the exa

6、ms .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) rainy, we (will take/ take/takes) walk out

7、side.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 beach if it (will rain/rain /rains).9. I (will

8、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 they (will miss/ miss/ misses) the bus?二、用所給詞的適當(dāng)

9、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

10、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 parents _( feel) glad.11.I _(go) to the beach if it_ ( no

11、t 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 English if he _(pass) the exams in Peking University.15.如果他

12、到的晚了會(huì)發(fā)生什么事情？What _ if he _ late?16. 如果努力學(xué)習(xí)，你就會(huì)取得好成績(jī)。If you_ _, you _ good _.17. 他如果看電視太久了，他的父母會(huì)不高興。If he _ TV too much, his parents _ _ unhappy.18. 如果我們?yōu)樗M織生日聚會(huì)，大家都會(huì)來(lái)的。Everyone _ if we _ a birthday party _ him.19. 如果明天不下雨，我會(huì)和你一起去公園的。 If it _ _ tomorrow, I _ go to the park _ you.20. 如果她睡過(guò)頭了，就會(huì)旅游遲到的。S

13、he;_ the trip if she _.21. 如果他有空，他會(huì)幫助你的。If he _, he _ you.22. 如果Tom考試不及格，他就沒(méi)有機(jī)會(huì)上高中了。Tom _have the _to go to the _high school if he _ the exams.23. 你如果抄同學(xué)的作業(yè)就不能學(xué)好各門(mén)功課。You _ _ good at all the subjects if you _ the other students homework. .單項(xiàng)選擇（15分）1.If you _ to the party, youll have a great time. A.

14、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. before, 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

15、answer if she _me. A. can tell, will ask B. will tell, will 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

16、he _ back, 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. too much D. much too10. Ill give the book to him if he _ here next Sunday.A. will

17、 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 where _？A. will the next Olympic Games held B. the next Olympic Games will be heldC. would the next Olympic Games be held D. the next Olympic Games would be held13. When my mother returned last night, I _ a book. A. read B. am reading C. was reading D. am g