when和while区别及练习

讲解三例句：1.Thegirlsaredancingwhiletheboysaresinging.2.Kangkang’smotheriscookingwhenhegetshome.3.When/WhileKangkang’smotheriscooking,hegetshome.一、用when或者while填空1.______Margowastalkingonthephone,hersisterwalkedin.2.______wevisitedtheschool,thechildrenwereplayinggames.3.______Sarahwasatthebarber’s,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。ItwhentheplaneinLondon.2.你记得汶川大地震时你在做什么吗？DoyourememberwhatyouwhenWenchuanEarthquake.3.当铃声想起的时候，我们正在操场上玩得很开心。Weontheplaygroundwhenthebell.4.当妈妈下班回家时，你在做什么？whenMumfromwork?5.当我在做作业时，有人敲门。Iwasdoingmyhomework,someonethedoor.6.当外星人正在买纪念品的时候，那个女孩报了警。thealienwasbuyingthesouvenirs,thegirlthepolice.答案1.while2.when3.while4.when5.while6.when7.When8.While9.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.tosee28.wereplaying1.wasraining,tookoff2.weredoing,tookplace3.werehavingfun,rang4.whatwereyoudoing,camebackhome5.while/when,knockedat6.while,called