名詞性從句之表語從句課件-高三英語一輪復(fù)習(xí)

表語從句1.什么是表語？(詳見句子結(jié)構(gòu)章節(jié)講解)主+系+表2.什么是表語從句？一個(gè)

充當(dāng)

成分，為表語從句。事實(shí)是我們已經(jīng)輸了這場(chǎng)比賽。Thefactis

. 句子表語wehavelostthegamethat表語從句的引導(dǎo)詞關(guān)聯(lián)詞含義是否作成分可否省略that無實(shí)義不作成分不可省略whether是否不作成分不可省略asif/asthough似乎，好像不作成分不可省略what(ever)(無論)什么作成分不可省略who(ever)(無論)誰作成分不可省略whom(ever)(無論)誰作成分不可省略which(ever)(無論)哪一個(gè)作成分不可省略whose(ver)(無論)誰的作成分不可省略when(ever)(無論)什么時(shí)候作成分不可省略where(ver)(無論)哪里作成分不可省略why為什么作成分不可省略how怎么樣作成分不可省略because因?yàn)樽鞒煞植豢墒÷钥键c(diǎn)&難點(diǎn)【考點(diǎn)一】if不能引導(dǎo)表語從句解題要點(diǎn)：表語從句中表示“是否”用whether，不能用if。[習(xí)題演練]1.HisfirstquestionwasifMr.Smithhadarrivedyet.(改錯(cuò))2.Thequestionis_______theenemyismarchingtowardsus.whetherwhether【考點(diǎn)二】asif/asthough虛擬vs現(xiàn)實(shí)解題要點(diǎn)：事情真實(shí)或極有可能發(fā)生，用陳述語氣；事情不真實(shí)或極少可能發(fā)生時(shí)，用虛擬語氣：現(xiàn)在事實(shí)相反，謂語用一般過去時(shí)；（be動(dòng)詞用were）過去事實(shí)相反，謂語用“had+過去分詞”；將來事實(shí)相反，謂語用“would/could/might+動(dòng)詞原形”。[習(xí)題演練]1.Lookatthedarkclouds.Itlooksasifit

.(rain)2.Itlooksasifhe

.(bedrunk)3.Theagedmanlooksasifhe

(be)young.isgoingtorainweredrunkwereyoungstartgo【考點(diǎn)四】why和because引導(dǎo)的表語從句。解題要點(diǎn)：Thatisbecause...指原因或理由，Thatiswhy...則指由于各種原因所造成的后果。即：that’sbecause+原因，譯為那是因?yàn)椤?/p>

that’swhy+結(jié)果，譯為所以……[習(xí)題操練]1.Hedidnotseethefilmlastnight.Thatis

hehadtohelphislittlesisterwithherhomework.2.Hehadseenthefilmbefore.Thatis

hedidnotseeitlastnight.becausewhy【考點(diǎn)五】Thereasonisthat...和It/Thatisbecause...[習(xí)題演練]1.Thereasonisbecauseheeatstoomuch.(改錯(cuò))2.Heistoofat.Itis

heeatstoomuch.3.Therea