名词性从句复习与定语从句.ppt

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1、名词性从句名词性从句复习基本概念：名词在句子中可以作主语，宾语，表语，同位语。我们就把在复合句中作主语，宾语，表语，同位语的句子称为名词性从句。引导名词性从句的连词有：从属连词：that,whether,if疑问代词：what,which,who,whom,whose疑问副词：when,where,why,how复合关系代词：whatever,whoever,whomever,whosever复合关系副词：whenever,wherever主语从句一个句子在复合句中充当主语叫主语从句。Thattheearthisroundist

2、rue.Whethershewillcomeornotisstillaquestion.Whatyouaredoingseemsverydifficult.Whentheywillstarthasnotbeendecidedyet.特别提醒1．引导主语从句的连词是不能省略的。2．可用形式主语it代替主语从句,但what除外；Itisstillaquestionwhethershewillcomeornot.Ithasnotbeendecidedyetwhentheywillstart.常用的It…that…主语从句模式：1)It

3、’s+adj.+that…It’seasythattheboyworksoutthismathsproblem.It’simportantthatweshouldknowtheinformation.2)It+seems/happenedthat…IthappenedthatIwasoutthatevening.X:It’shappenedthat….3)It’s+过去分词＋that…It’shopedthatourteamcanwinthegame.It’sthoughtthathousingproblembecomesmor

4、eandmoreserious.(It’ssaidthat…It’sconsideredthat…It’sreportedthat…It’sbelievedthat…)对比强调句：It’s+被强调部分＋that/who..被强调部分：人，时间，地点，原因．．．ItwasinthelibrarythatIlostmyglasses.ItisonSundaythathealwaysgoesfishing.表示“是否”意义时，一般用whether而不用if引导主语从句，但口语时，如果有形式主语it引导，既可用whether，也可用if

5、。Itisstillaquestionifshewillcomeornot4.what作从句中的成分．that不充当任何成分如；Thatthethiefwasarrestedistrue.Whatsurprisedmemostistheseriouspollutionoftheriver.试试看：1＿＿＿hewillgoabroadistrue.2______wearegoingtoplanttreestomorrowhasbeendecided.3_____upsetherishisunkindwords.4_____weex

6、pectisanactiveyoungman.ThatThatWhatWhatthat与whether区别that用于肯定句，肯定的语气whether用于疑问或否定的语气．1____wecanwinthematchisclear.2____wecanwinthematchisstillaproblem.3____hewillgotoLondonhasbeendecided4_______hewillgotoLondonhasnotbeendecidedThatWhetherThatWhether宾语从句一个句子在复合句中充当宾语

7、就叫宾语从句。I’mglad(that)youhavepassedtheexam.Idon’tknowwhether(if)youarewillingtohelpme.I’msorryforwhatIhavesaid.特别提示1．宾语从句的连词that可以省略。但用and并列两个宾语从句时，第二个从句前的that不可以省略.2．用whetherornot不用if:在介词后的宾语从句通常　用whether引导Idon’tknowwhetherornothewillcome.Itdependsonwhetherheiscomingo

8、rnot.c.真理性的事实，大自然一成不变的东西，时态永远用　　现在时．Hesaid(that)hewouldgotoBeijingforameetingandthathecouldgotoseehisuncleassoonashearrivedthere.He