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1、狀語從句講解由從句擔(dān)任的狀語,在句子中可修飾謂語(或其他動(dòng)詞)、形容詞、副詞或是整個(gè)句子,它可以用來表示時(shí)間、地點(diǎn)、原因、目的、結(jié)果、條件、方式、比較、讓步等。狀語從句是一較大的語法項(xiàng)目,也是近幾年高考題中常見的一個(gè)重要試點(diǎn)。高考中已考查了時(shí)間、讓步、地點(diǎn)、條件、目的等狀語從句,這些從句仍是今后高考熱點(diǎn),應(yīng)作充分準(zhǔn)備。同時(shí)對(duì)方式狀語從句也應(yīng)引起重視。一、時(shí)間狀語從句表示時(shí)間的狀語從句可由when,as,while,whenever,after,before,till(until),since,once,assoonas(
2、或themoment),bythetime,nosooner……than,hardly(scarcely)……when,everytime等引導(dǎo)。e.g.WhenIcameintotheoffice,theteacherswerehavingameeting.Hestartedassoonashereceivedthenews.Onceyouseehim,youwillneverforgethim.NosoonerhadIgonetobedthanIwenttosleep.二、原因狀語從句原因狀語從句是表示原因或理由的,
3、引導(dǎo)這類從句的最常用的連詞是because,since,as,nowthat(既然)等,for表示因果關(guān)系時(shí)(它引導(dǎo)的不是從句)為并列連詞,語氣不如because強(qiáng)。e.g.Heisdisappointedbecausehedidn'tgettheposition.Asitisraining,Iwillnotgoout.Nowthatyoumentionit,Idoremember.三、地點(diǎn)狀語從句引導(dǎo)地點(diǎn)狀語從句的連詞是where和wherever等。e.g.Sitwhereveryoulike.Makeamarkwh
4、ereyouhaveaquestion.四、目的狀語從句引導(dǎo)目的狀語從句最常用的詞(組)是so,sothat(從句謂語常有情態(tài)動(dòng)詞),inorderthat,incase(以防,以免)等。e.g.Speakclearly,sothattheymayunderstandyou.ShehasboughtthebookinorderthatshecouldfollowtheTVlessons.Heleftearlyincaseheshouldmissthetrain.五、結(jié)果狀語從句結(jié)果狀語從句是表示事態(tài)結(jié)果的從句,通常主句是
5、原因,從句是結(jié)果。由sothat(從句謂語一般沒有情態(tài)動(dòng)詞),so……that,such……that等引導(dǎo)。e.g.Shewasill,sothatshedidn'tattendthemeeting.Hewassoexcitedthathecouldnotsayaword.Sheissuchagoodteacherthateveryoneadmiresher.六、條件狀語從句條件狀語從句分真實(shí)性(有可能實(shí)現(xiàn)的事情)與非真實(shí)性(條件與事實(shí)相反或者在說話者看來不大可能實(shí)現(xiàn)的事情)條件句。引導(dǎo)條件狀語從句的詞(組)主要有if,
6、unless,so(as)longas,onconditionthat,so(as)faras,ifonly(=if)。注意:條件從句中的if不能用whether替換。e.g.Ifheisnotintheoffice,hemustbeoutforlunch.Youmayborrowthebooksolongasyoukeepitclean.SofarasIknow(據(jù)我所知),hewillbeawayforthreemonths.Youcangoswimmingonconditionthat(=if)youdon'tgo
7、toofarawayfromtheriverbank.Ifhehadcomeafewminutesearlier,hecouldhaveseenher.七、讓步狀語從句讓步狀語從句可由although,though,as,evenif(though),however,whatever,whether……or,nomatterwho(when,what,……)等引導(dǎo)。注意:as引導(dǎo)的讓步狀語從句一般是倒裝的。e.g.Thoughheisachild,heknowsalot.Childasheis,heknowsalot.W
8、hatever(=Nomatterwhat)yousay,I'llneverchangemymind.八、方式狀語從句方式狀語從句常由as,asif(though),theway,ratherthan等引導(dǎo)。e.g.YoumustdotheexerciseasIshowyou.Heactedasifnothingha