初中英语语法状语从句讲解专项练习及答案1.易混引导词while,when,as的区别：when可以和延续性动词连用，也可以和短暂性动词连用；而while和as只能和延续性动词连用。如：Whenhecamein,hismotherwascooking.When(While)wewereatschool,wewenttothelibraryeveryday.when从句的谓语动词可以在主句谓语动作之前、之后或同时发生；while和as从句的谓语动作必须是和主句谓语动作同时发生。While表示时间段,因此，while从句的谓语动词要用延续性动词。如：Pleasedon'ttalksoloudwhileothersareworking.As与when用法相似，但着重强调主句动作与从句动作同时发生，有"随着……"或"一边……一边……"之意。如：Asyougetolder,yougetmoreknowledge.随着年龄的增长，你获得的知识就越多。在将来时从句中，常用when，且从句须用一般时代替将来时。①YoushallborrowthebookwhenIhavefinishedreadingit．在我读完这本书后，你可以借阅。②Whenthemanagercomeshereforavisitnextweek，Illtalkwithhimaboutthis．下周，经理来这参观时，我会和他谈谈此事。when用于表示“一……就……”的句型中（指过去的事情）。sb．hadhardly（＝scarcely）donesth．when．．．＝Hardly／Scarcelyhadsb．donesth．when．．．①Ihadhardly／scarcelyclosedmyeyeswhensomeoneknockedatthedoor．＝Hardly／ScarcelyhadIclosedmyeyeswhensomeoneknockedatthedoor．我刚一闭上眼，就有人在敲门了。②Ihadhardly／scarcelyenteredmyroomwhenthetelephonerang．＝Hardly／ScarcelyhadIenteredmyroomwhenthetelephonerang．我刚一走进房门，电话就响了2．because,as,since的区别：because用于表示直接原因,回答why提出的问题，语气最强；As用于说明原因,着重点在主句，常译成"由于"；since表示显然的或已知的理由或事实，常译成"既然"。如：Waterisveryimportantbecausewecan'tlivewithoutit.Hedidn'tcomeyesterdayashismotherwasill.I'lldoitforyousinceyouarebusy.3．such…that,so…that,sothat引导结果状语从句的区别：such是形容词，修饰名词;so是副词，修饰形容词或副词。其结构如下：1)such+a(n)+形容词+单数可数名词+that……2)such+形容词+复数可数名词+that……3)such+形容词+不可数名词+that……。如：ThiswassuchagoodfilmthatIwenttoseeitseveraltimes.Itwassuchgoodbooksthattheysellwell.ItwassuchbadweatherthatIhadtostayathome.HespokesofastthatIcouldn'tfollowhim.Heissuchalovelyboythatwealllikehim.=Heissolovelyaboythatwealllikehim.注：在"形容词+可数名词复数/不可数名词"结构中，当名词前有many,much,few,little表示数量的多少时，名词前用so。如：Shemadesomanymistakesthatshedidn'tpasstheexam.sothat既可以引导目的状语从句又可以引导结果状语从句引导目的状语从句时可译为"为了",引导结果状语从句时可译为"以便"如Ispeakloudlysothatallthestudentscanhearmeclearly.(目的状语从句)Marialikesthewoolendresssothatshedecidestobuyitimmediately.(结果状语从句)(1)sothat引导目的状语从句时表示“以便为了”从句中常使用can/could/may/might/will/would/should等情态动词或助动词引导结果状语从句时从句中一般不用can和may等词。(2)Sothat引导的目的状语从句之前不用逗号而sothat引导的结果状语从句与主句之间往往有逗号相隔开即略作停顿意思是“因此;所以”。请比较Heworkedhardathislessonssothathecouldgainhighgradesintheexams.他努力学习功课争取考试能获得好成绩。选择合适的连接词，完成下列句子。1.Jimspendsalotofmoneyonbooks______heisnotrich.2.Katefellintosleep______shewaslisteningtothemusic.3.----IsDavidatschooltoday?----No.Heisathome______hehasabadcold.4.Wewon'thavesupper______mymothercomesback.5.Speaktohimslowly______hemayunderstandyoubetter.6.______shedoesn'tcomeonSunday,I'llgofishingbymyself.7.Itisfouryears______Ihadleftthatsmallvillage.8.______theairmoves,itiscalledwind.9.Wewillgotothepark______itdoesn'tra...
