when和while区别及专项练习-含答案

when和while用法区别专项练习讲解三例句：Thegirlsaredancingwhiletheboysaresinging.Kangkang'smotheriscookingwhenhegetshome.When/WhiIeKangkang'smotheriscooking,hegetshome.一、用when或者while填空Margo was talking onthe phone, hersister walked in.wevisitedtheschool,thechildrenwereplayinggames.Sarah was atthe barbers,Iwasgoingto class.IsawCarlos,hewaswearingagreenshirt.Allen was cleaning hisroom,the phonerang.Rita boughthernewdog； itwas wearinga little coat.Hewasdrivingalongsuddenlyawomanappeared.Jakewaswaitingatthedoor,anoldwomancalledtohim.Hewasreadingabooksuddenlythetelephonerang.itbegantorain,theywereplayingchess.二、用所给动词适当形式填空WhileJake(look)forcustomers,he(see)awoman.They (play)footballontheplaygroundwhenit(begin)torain.Astrangebox(arrive)whilewe(talk).John (sleep)whensomeone(steal)hiscar.Fatherstill(sleep)whenI(get)upyesterdaymorning.Grandma(cook)breakfastwhileI(wash)myfacethismorning.Mother(sweep)thefloorwhenI(leave)home.I(read)ahistorybookwhensomeone(knock)atthedoor.MaryandAlicearebusy(do)theirhomework.Theteacheraskedus(keep)thewindowsclosed.Ifollowedit(see)whereitwasgoing.Thestudents(play)basketballontheplaygroundfrom3to4yesterdayafternoon.三、完成下面句子，词数不限.飞机在伦敦起飞时正在下雨。ItwhentheplaneinLondon..你记得汶川大地震时你在做什么吗Doyourememberwhat_you_whenWenchuanEarthquake..当铃声想起的时候，我们正在操场上玩得很开心。Weontheplaygroundwhenthebell..当妈妈下班回家时，你在做什么霄whenMumfromwork.当我在做作业时，有人敲门。Iwasdoingmyhomework, someonethedoor..当外星人正在买纪念品的时候，那个女孩报了警。thealienwasbuyingthesouvenirs,thegirlthepolice.答案:looking,sawplaying,began,weretalking

lel5..was,sleepingwaswashingsweeping,left18,wasreading,knockedsleeping,sto

gotcooking,19,doingkeep21.wasraining,tookweredoing,tookwerehavingfun