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1、标准实用名词性从句名词性从句是由if,whether,that和各种疑问词充当连接词所引导的从句,其功同名词一样。一.主语从句主语从句是在复合句中充当主语的从句,通常放在主句谓语动词之前或由形式主语it代替,而本身放在句子末尾。1.It作形式主语和it引导强调句的比较It文案大全标准实用作形式主语代替主语从句,主要是为了平衡句子结构,主语从句的连接词没有变化。而it引导的强调句则是对句子某一部分进行强调,无论强调的是什么成分,都可用连词that。被强调部分指人是也可用who/whom。例如:Itisapitythatyoudidn'tgotose
2、ethefilm.Itdoesn'tinterestmewhetheryousucceedornot.Itisinthemorningthatthemurdertookplace.ItisJohnthatbrokethewindow.2.用it作形式主语的结构(1)Itis+名词+从句Itisafactthat…事实是…Itisanhonorthat…非常荣幸Itiscommonknowledgethat…是常识(2)itis+形容词+从句Itisnaturalthat…很自然…Itisstrangethat…奇怪的是…(3)itis文案大全标准
3、实用+不及物动词+从句Itseemsthat…似乎…Ithappenedthat…碰巧…(4)it+过去分词+从句Itisreportedthat…据报道…Ithasbeenprovedthat…已证实…3.主语从句不可位于句首的五种情况(1)if引导的主语从句不可居于复合句句首。(2)Itissaid,(reported)…结构中的主语从句不可提前。例如:ItissaidthatPresidentJingowillvisitourschoolnextweek.(right)ThatPresidentJiangwillvisitourschool
4、nextweekissaid.文案大全标准实用(wrong)(3)Ithappens…,Itoccurs…结构中的主语从句不可提前。例如:Itoccurredtohimthathefailedintheexamination.(right)Thathefailedintheexaminationoccurredtohim.(wrong)(4)Itdoesn'tmatterhow/whether…结构中的主语从句不可提前。例如:Itdoesn'tmatterwhetherheiswrongornot.(right)Whetherheiswrongo
5、rnotdoesn'tmatter.(wrong)(5)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?文案大全标准实用(right)Isthatwillrainintheeveninglikely?(wrong)4.What与that在引导主语从句时的区别What引导主语从句时在句时在从句中充当句子成分,如主语.宾语.表语,而that则不然。例如:1)Whatyousaidyesterdayisright.2)Thatsheisstillaliveisaconsol
6、ation.二.宾语从句宾语从句就是在复合句中作宾语的名词性从句,通常放在主句谓语动词(及物动词)或介词之后。1.作动词的宾语(1)由that引导的宾语从句(that通常可以省略),例如:Iheardthatbejoinedthe文案大全标准实用army.(2)由what,whether(if)引导的宾语从句,例如:1)Shedidnotknowwhathadhappened.2)Iwonderwhetheryoucanchangethisnoteforme.(3)动词+间接宾语+宾语从句。例如:Shetoldmethatshewouldacce
7、ptmyinvitation.2.作介词的宾语例如:Oursuccessdependsuponhowwellwecancooperatewithoneanother.3.作形容词的宾语例如:Iamafraid(that)I'vemadeamistake.That引导的从句常跟在下列形容词后作宾语:Anxious,aware,certain,confident,convinced,文案大全标准实用determined,glad,proud,surprised,worried,sorry,thankful,ashamed,disappointed,a
8、nnoyed,pleased,hurt,satisfied,content等。也可以将此类词后的that从句的看作原因状语从句。4.It