when和while区别及练习.doc

精品文档讲解三例句：1. The girls are dancing while the boys are singing.2. Kangkangs mother is cooking when he gets home.3. When/While Kangkangs mother is cooking, he gets home.一、用when或者while填空1._Margowastalkingonthephone, hersisterwalkedin.2._wevisitedtheschool, 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.Thealienwasinthemuseum, Icalledthepolice. 13. TheboywaswalkingdownthestreetaUFOlanded. 14.Thealienwasvisitingthemuseum, theboycalledtheTVstation.15. Iwascleaningmyroomthefirebrokeout. 16.Lindashoutedhisname, somepeoplelookedather.二、用所给动词适当形式填空17. WhileJake_ (look)forcustomers,he_ (see)awoman. 18.They_ (play)footballontheplaygroundwhenit_ (begin)torain.19. Astrangebox_ (arrive)whilewe_(talk). 20.John_ (sleep)whensomeone_ (steal)hiscar.21. Fatherstill (sleep) whenI (get) upyesterdaymorning. 22. Grandma (cook)breakfastwhileI (wash)myfacethismorning.23. Mother (sweep) thefloorwhenI (leave) home. 24. I (read)ahistorybookwhensomeone (knock)atthedoor.25. MaryandAlicearebusy (do) theirhomework.26. Theteacheraskedus (keep)thewindowsclosed.27. Ifollowedit (see) whereitwasgoing. 28. Thestudents (play) basketballontheplaygroundfrom3to4yesterdayafternoon.三、完成下面句子，词数不限1.飞机在伦敦起飞时正在下雨。 It whentheplane inLondon.2.你记得汶川大地震时你在做什么吗？ Do you remember what you when Wenchuan Earthquake .3.当铃声想起的时候，我们正在操场上玩得很开心。 We ontheplaygroundwhenthebell .4.当妈妈下班回家时，你在做什么？ when Mum fromwork?5.当我在做作业时，有人敲门。 Iwasdoingmyhomework, someone thedoor.6.当外星人正在买纪念品的时候，那个女孩报了警。 thealienwasbuyingthesouvenirs, thegirl thepolice.答案 1.while2.when3.while4.when5.while6.when7.When8.While 9.When10.When11.While12.when13.when14.while15.when16.when17.waslooking,saw18.wereplaying,began19.arrived,weretalking20.wassleeping,stole21.was,sleep, got22.wascooking, waswashing23.wassweeping,left24,wasreading,knock25,doing26.tokeep27.to see28.wereplaying1. wasraining, tookoff2. weredoing,tookplace3. werehavingfun,rang4. whatwerey