第七when while as 區(qū)別及練習(xí)

1、【精品文檔】如有侵權(quán)，請(qǐng)聯(lián)系網(wǎng)站刪除，僅供學(xué)習(xí)與交流第七 when while as 區(qū)別及練習(xí).精品文檔.When while as區(qū)別一、根據(jù)從句動(dòng)作的持續(xù)性來(lái)區(qū)分1、“主短從長(zhǎng)”型：即主句是一個(gè)短暫性動(dòng)作，而從句是一個(gè)持續(xù)性動(dòng)作，此時(shí)三者都可用。如：Jimhurthisarmwhilewhen，ashewasplayingtennis.吉姆打網(wǎng)球時(shí)把手臂扭傷了。2、“主長(zhǎng)從長(zhǎng)”型：即主句和從句為兩個(gè)同時(shí)進(jìn)行的動(dòng)作或存在的狀態(tài)，且強(qiáng)調(diào)主句動(dòng)作或狀態(tài)延續(xù)到從句所指的整個(gè)時(shí)間，此時(shí)通常要用while。IalwayslistentotheradiowhileImdriving.我總是一邊開(kāi)車一邊

2、聽(tīng)收音機(jī)。Hedidntaskmein;hekeptmestandingatthedoorwhilehereadthemessage.他沒(méi)有讓我進(jìn)去，他只顧看那張條子，讓我站在門口等著。但是，若主句和從句所表示的兩個(gè)同時(shí)進(jìn)行的動(dòng)作含有“一邊一邊”之意時(shí)，則習(xí)慣上要用as。如：Heswunghisarmsashewalked.他走路時(shí)擺動(dòng)著手臂。3、“主長(zhǎng)從短”型：即主句是一個(gè)持續(xù)性動(dòng)作，而從句是一個(gè)短暫性動(dòng)作，此時(shí)可以用as或when，但不能用while。如：Itwasraininghardwhenaswearrived.我們到達(dá)時(shí)正下著大雨。二、根據(jù)主句與從句動(dòng)作是否同時(shí)發(fā)生來(lái)區(qū)分1、若主句

3、與從句表示的是兩個(gè)同時(shí)發(fā)生的短暫性動(dòng)作，含有類似漢語(yǔ)“一就”的意思，英語(yǔ)一般要用as(也可用when)。如：TheicecrackedaswhenIsteppedontoit.我一踩冰就裂了。2、若主句與從句表示的是兩個(gè)幾乎同時(shí)發(fā)生的短暫性動(dòng)作，含有類似漢語(yǔ)“剛要就”“正要卻”的意思，英語(yǔ)一般要用as(也可用when)，且此時(shí)通常連用副詞just。如：Icaughthimjustwhenashewasleavingthebuilding.他正要離開(kāi)大樓的時(shí)候，我把他截住了。三、根據(jù)是否具有伴隨變化來(lái)區(qū)分若要表示主句動(dòng)作伴隨從句動(dòng)作同時(shí)發(fā)展變化，有類似漢語(yǔ)“隨著”的意思，英語(yǔ)習(xí)慣上要用as，而不

4、用when或while。如：Theroomgrewcolderasthefireburntdown.隨著爐火逐漸減弱，房間越來(lái)越冷。注：若不是引導(dǎo)從句，而是引出一個(gè)短語(yǔ)，則用with，不用as。如：Withwintercomingon,itstimetobuywarmclothes.隨著冬天到來(lái)，該買暖和衣裳了。四、根據(jù)從句動(dòng)作的規(guī)律性來(lái)區(qū)分若暗示一種規(guī)律性，表示“每當(dāng)?shù)臅r(shí)候”，英語(yǔ)一般要用when。如：Itscoldwhenitsnows.下雪時(shí)天冷。五、根據(jù)主從句動(dòng)作的先后順序來(lái)區(qū)分若主句與從句所表示的動(dòng)作不是同時(shí)發(fā)生，而是有先后順序時(shí)，一般要用when。如：Whenhearriveshe

5、lltellusallaboutthematch.等他到了，他會(huì)好好給我們講講那場(chǎng)比賽的情況。六、根據(jù)是否具有“趁機(jī)”意味來(lái)區(qū)分1、若從句所表示的“當(dāng)?shù)臅r(shí)候”具有“趁機(jī)”的意味，則通常用while。如：Strikewhiletheironishot.趁熱打鐵。七、根據(jù)是否用作并列連詞來(lái)區(qū)分when可用作并列連詞，表示“這時(shí)(突然)”；while也可以用作并列連詞，表示“而”“卻”(表示對(duì)比)；但as則沒(méi)有類似用法。如：IwasjustabouttogotobedwhenIheardaknockonthedoor.我正要睡覺(jué)，聽(tīng)見(jiàn)有人敲門。Onepersonmayliketospendhisva

6、cationattheseashore,whileanothermaypreferthemountains.八、根據(jù)所引出的省略句來(lái)區(qū)分1、as和when之后均可直接跟一個(gè)名詞，構(gòu)成省略句；但是while一般不這樣用。如：AsWhenaboy,helivedinJapan.他小時(shí)候在日本。2、when和while之后可接現(xiàn)在分詞、介詞短語(yǔ)、形容詞等構(gòu)成省略句，但as一般不這樣用。如：WhenWhilereading,hefellasleep.他看書時(shí)睡著了。一用所給動(dòng)詞正確行使填空1. I _ (have) my breakfast at half past six yesterday mor

7、ning.2. Mary _ (go) over her lessons from six to seven last night. John and peter _(do) the same thing.3. What _ you _ (do) at that time? We _ (watch) TV.4. Was your father at home yesterday evening? Yes ,he was. He _ (listen) to the radio.5. They _(not make) a model ship when I saw him.6. _ they _

8、(have) a meeting at 4 yesterday afternoon?No, they _. They _ (clean) the classroom.7. _ it _(rain) when you left school? Yes, it _. (No, it _)8. What _ your father _ (do) when he was your age?9. One day, Edison _ (wait) for a train to arrive, and suddenly a little boy ran to the track(軌道) to play.10

9、. He asked me if I _ (go) fishing that afternoon.11. The three of them were in a hurry because their plane _ (leave) in five minutes.12. In a letter, john told us that he _ (come) to china next month.13. When the bell rang, jenny _ (wait) in her seat.14. She _ (make) her dress the whole afternoon.15

10、. While my father _ (look) through the evening paper, he suddenly _ a cry.16. When I _ (come) in the room, he _ (see) me, for he _ (read) something17. When we _ (arrive) at the village, it _ (get) dark and it _ (rain) hard.18. I _ (know) you _(wait) for me here.19. One day a little monkey _ (play) i

11、n a tall tree. A mother crocodile(鱷魚) _ (look) for food near the bank.20. What _ your father _ (do) yesterday evening? He _ (study) at the evening school.21. Later his parents found that he _ (sit) on some eggs.22. When he knocked at the door, my aunt _ (cook)23. The students _ (sing) and _ (dance)

12、happily on the playground at that time.24. I _ (write) a letter when the door bell rang.25. We had no classed at that time. We _ (plant) trees.二.改錯(cuò)1.SheisfatbutIamthin.2.Itwasrainingwhilewearrived.3.Shesangwhilehewalked.三.選擇最佳答案：1.ShethoughtIwaspraisingherchild，_，infact，Iwasscoldinghimforhisbadbehav

13、iorsatschool.A.whatB.whileC.sothatD.therefore2.Idoeverysinglebitofhousework_myhusbandBobjustdoesthedishesnowandthen.A.whileB.sinceC.whenD.as3.Wewereswimminginthelake_suddenlythestormstarted.A.whenB.whileC.untilD.befor四填空：when while1._Margowastalkingonthephone,hersisterwalkedin.2._wevisitedtheschool,

14、thechildrenwereplayinggames.3._Sarahwasatthebarbers,Iwasgoingtoclass.4._IsawCarlos,hewaswearingagreenshirt.5._Allenwascleaninghisroom,thephonerang.6._Ritaboughthernewdog,itwaswearingalittlecoat.7.Hewasdrivingalong_suddenlyawomanappeared.8._Jakewaswaitingatthedoor,anoldwomancalledtohim.9.Hewasreadingabook_suddenlythetelephonerang.10._itbegantorain,theywereplayingchess.11.Shesawataxicoming_thewomanwaswaitingunderthestreetlight.12.