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时间状语从句易错题练习1)Whenhewasachildhewasalwaystryingoutnewideas.(be)2)Hewasleavingwhensomeoneknockedatthedoor.(knock)3)Whenthemanagercomeshereforavisitnextweek,I’lltalkwithhimaboutthis.(talk)4)Iwaswalkingalongthestreetwhenaballhitmeonthehead.(hit)5)Whilemywifewasreadingthenewspaper,IwaswatchingTV.(read)6)WhileJimwasmendinghisbike,LinTaocametoseehim.(mend)7)Youcan’tdoyourhomeworkwhileyou’rewatchingTV.(watch)8)Asmymothersangthoseoldsongs,tearsrandownhercheeks.(sing)9)Thelittlegirlssangastheywent.(go)10)HecameinasIwasgoingtobed.(go)1)Hefellasleepwhen[while,as]hewasreading.2)Shesangasshewentalong.3)Itwasraininghardwhen[as]wearrived.4)Ikeptsilentwhilehewaswriting.5)Asitgrewdarker,itbecamecolder.6)It’scoldwhenitsnows.7)Iwillgohomewhenhecomesback.8)Wewereabouttostartwhenitbegantorain.9)Helikescoffee,whileshelikestea.10)As[When]aboy,helivedinJapan.11)When[While]reading,hefellasleep.12)Heraisedhishatwhenhesawher.13)Whenshecamein,Istoppedeating.14)Whilemywifewasreadingthenewspaper,IwaswatchingTV.15)____as___hegetsolder,hebecomesmorequicktempered.16)____when___hecalled,Iwasinthekitchenpreparingameal.17).____as_____timepassed,thingsseemedtogetworse18)Thesunwassetting___while/when___Iwaswalkinghome.19)___when/while__hewasenjoyinghimselfinthepub,hiswifewasdoinghouseworkathome.20)_while_thepolicemanwaschasingoneofthetwothieves,theotherwasrunningaway.总结：三者可表示“当……时候”,区别如下:若主句表示的是一个短暂性动作,从句表示的是一个持续性动作,三者都可用:若主、从句表示两个同时进行的持续性动作,且强调主句表示的动作延续到从句所指的整个时间,通常要用while:若从句是一个短暂性动作,主句是一个持续性动作,可用as/when但不用while若要表示两个正在发展变化的情况,相当于汉语的“随着”,一般用as:表示“每当…的时候”(暗示一种规律性),一般要用when:若主从句所表示的动作不是同时发生,而是有先后顺序时,一般要用when:when可用作并列连词,表示“这时(突然)”;while也可以用作并列连词,表示“而”、“却”(表示对比);as和when后均可直接跟一个名词,构成省略句,但while一般不这样用:when和while后可接现在分词、介词短语、形容词等构成省略句,但as一般不这样用: