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1、窗體底部狀語從句1.時(shí)間狀語從句的連詞表示時(shí)間的連詞有when,while,as,bythetime,before,after,since,till/until,assoonas,有些名詞短語也可以引導(dǎo)時(shí)間狀語從句,如themoment,theinstant,eachtime,有些是固定句型如:nosooner…thanhardly/scarcely…when。在這些連詞的使用中應(yīng)注意①as強(qiáng)調(diào)同時(shí),也表示"一邊……,一邊……",while表示主句動(dòng)作發(fā)生在從句的過程之中,要求從句謂語動(dòng)詞為狀態(tài)動(dòng)詞或持續(xù)性動(dòng)詞
2、,when的使用則比較簡單,相當(dāng)于漢語的"當(dāng)……時(shí)候"。如:Doingyourhomeworkisasurewaytoimproveyourtestscores,andthisisespeciallytrue____itcomestoclassroomtests.A.whenB.sinceC.beforeD.after(1996.1)四個(gè)選項(xiàng)都表示時(shí)間,但根據(jù)主從句間的關(guān)系可以判斷答案為A。②注意when的特殊句型下列句型中when連接的不是時(shí)間狀語從句,但考試中卻常與其它時(shí)間狀語從句的連詞一塊出題。were/
3、wasdoingsomethingwhen…were/wasabouttodosomethingwhen…h(huán)adjustdonesomethingwhen…四級考題中不乏對上述結(jié)構(gòu)的考查,如:Ihadjuststartedbackforthehousetochangemyclothes___Iheardvoices.A.asB.whenC.afterD.while(1997.6)Ifeltsomewhatdisappointedandwasabouttoleave___somethingoccurredwhic
4、hattractedmyattention.A.unlessB.untilC.whenD.while(1996.1)這類考題比較簡單,只要同學(xué)們清楚這一句型,答案則自然可得。③注意nosooner…than….和hardly/scarcely…when句中的時(shí)態(tài)。④注意not…until中時(shí)間狀語可以提前。如____quiterecently,mostmothersinBritaindidnottakepaidworkoutsidethehome.A.BeforeB.UntilC.FromD.Since(199
5、5.6)但只要同學(xué)們能夠辨認(rèn)not…until的句法結(jié)構(gòu),答案也就顯而易見。比較常見的提前方式是將notuntil….提至句首,后面用肯定形式,主謂倒裝。本題可以改成,NotuntilquiterecentlydidmostmothersinBritaintakepaidworkoutsidethehome.這時(shí),句子采用主謂倒裝結(jié)構(gòu),應(yīng)注意。⑤在對名詞短語做連詞引導(dǎo)時(shí)間狀語從句時(shí),常與名詞構(gòu)成的其它短語相區(qū)別。如:Youseethelightening___ithappens,butyouhearthethu
6、nderlater.A.theinstantB.foraninstantC.ontheinstantD.inaninstant(1997.1)能夠引導(dǎo)時(shí)間狀語從句的是名詞theinstant,而不是由其構(gòu)成的介詞短語。⑥注意含有時(shí)間狀語從句的固定句型,如Itwon'tbelongbefore…和Itis…since兩類句型。Itwon'tbelongbefore可以有三個(gè)變體,即:Itwas(not)+一段時(shí)間+before,Itwon'tbe+一段時(shí)間+before。如95年6月就有對此的考查:Scienti
7、stssayitmaybefiveortenyears____itispossibletotestthismedicineonhumanpatients.A.sinceB.beforeC.afterD.when2.原因狀語從句的連詞原因狀語從句一般由because,since,as,nowthat,consideringthat,seeingthat連接。對于表原因連詞本身的區(qū)別考查相對較少,主要是與其它狀語從句連詞的對比。如:①____youareleavingtomorrow,wecaneatdinnert
8、ogethertonight.(1999.6)A.ForB.SinceC.BeforeD.While②____thatmyheadhadcleared,mybrainwasalsobeginningtoworkmuchbetter.(1997.6)A.ForB.NowC.SinceD.Despite1)從以上兩題可以看出,首先,同學(xué)們要根據(jù)主從句的語意關(guān)系,確定是什么狀語從句,然后在進(jìn)