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1、名词从句全解及真题练习名词性从句(基础篇)一.名词性从句连词:1)连接词that,if,whether,asif/asthough,because2)连接代词:who,whom,whose,what,which,whoever,whatever,whichever3)连接副词:when,where,why,how,howmany/much/long/soon/often,whenever,wherever二.主语从句1.that引导的主语从句,只起连接作用ThatwemustmasterEnglishwor
2、dsasmanyaspossibleisveryimportant.2.wh-引导的主语从句:①连接②承担句子成分(主、宾、表、定、状)Whatyouaredoingisverydifficult.3.whether/if引导主语从句:①whether引导主从既可放句首,也可放句中。②但if引导的主从只能放句中,前用it作形式主语Whetheritistrueremainsaquestion.Itisdoubtfulwhetherthemanagerknewthedetailsoftheplan.4.It+
3、谓语+主语从句1)it+be+形容词+that/wh-从句Itiscertainthatyoursonwilldowellinhisexam.2)it+be+名词+that/wh-从句Itremainsaquestionwhetheritistrue.3)it+be+过去分词+that/wh-从句Ithasnotbeendecidedwhowillperformtheoperation.4)it+不及物动词+that/wh-从句IthappenedthatIwasnottherethatday.(注意:1)
4、~3)在表示建议、要求、命令、愿望、义务、责任时,从句中的谓语要用“should+V原形”)5.主从应该注意的问题:1)以下情况,真正主语that引导的从句不可和形式主语相替换①Itissaid/reported…结构中的主语从句不可提前。例如:ItissaidthatPresidentJiangwillvisitourschoolnextweek.(ThatPresidentJiangwillvisitourschoolnextweekissaid.×)②Ithappens/occurs…结构中的主语从句
5、不可提前。例如:Itoccurredtohimthathefailedintheexamination.(Thathefailedintheexaminationoccurredtohim.×)③Itdoesn’tmatterhow/whether…结构中的主语从句不可提前。例如:Itdoesn’tmatterwhetherheiswrongornot.④含主语从句的复合句是疑问句时,主语从句不可提前。例如:Isitlikelythatitwillrainintheevening?⑤if引导的主语从句,例如
6、:Doesitmatterifhecan’tfinishthejobontime?2)wh-引导的主语从句既可放句首也可放居末,但是what,whatever,whoever等引导的主从不用it作形式主语。例如:Whoeverwantstoseethefilmmaygetaticket.3)下列两种情况中常用it作形式主语①主语从句是一个疑问句:Hasisbeendecidedwherewewillperformtheexperiment?②在“Itdoesnotmatter+how,whether,if.
7、..”结构中Itdoesnotmattertomewhetherheisgoingthereornot.4)由what引导的主语从句以及谓语动词单复数问题主从中what还可用于强调。what引导的主语从句一般按单数对待,但实际用单数还是复数取决于其含义。Whatweneedistime.WhatIdidwastoturnofftheradio.三.宾语从句宾从可以作谓语动词的宾语、介词的宾语、还可作非谓语动词(不定式,动名词,现在分词)的宾语。1)作动词的宾语① that引导宾从在口语和非正式情况下常省略I
8、believe(that)youaretellingthetruth.② 在demand/insist/suggest...等表决定、要求、建议等动词之后,that从句常用“(should)+V原形”Themanagersuggestthatweshouldcalloftheplan.③ 需要否定前置的情况:在assume,believe,expect,guess,imagine,suppose,think等表示