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1、名性从句精精析（1）名性从句精精析（1）——主从句、从句、表从句、同位从句名性从句是由if,whether,that和各种疑充当接所引的从句，其功能同名一。一．主从句主从句是在复合句中充当主的从句，通常放在主句之前或由形式主it代替，而本身放在句子末尾。1.It作形式主和it引句的比It作形式主代替主从句，主要是了平衡句子构，主从句的接没有化。而it引的句是句子某一部分行，无的是什么成分，都可用that。被部分指人是也可用who/whom。例如：Itisapitythatyoudidn’tgotoseethefilm.Itdoesn’tinterestmewhetheryousucceed
2、ornot.Itisinthemorningthatthemurdertookplace.ItisJohnthatbrokethewindow.2.用it作形式主的构(1)Itis＋名＋从句Itisafactthat⋯事是⋯Itisanhonorthat⋯非常荣幸Itiscommonknowledgethat⋯是常(2)itis＋形容＋从句Itisnaturalthat⋯很自然⋯Itisstrangethat⋯奇怪的是⋯(3)itis＋不及物＋从句Itseemsthat⋯似乎⋯Ithappenedthat⋯碰巧⋯(4)it＋去分＋从句Itisreportedthat⋯据道⋯Ithasbee
3、nprovedthat⋯已⋯3.主从句不可位于句首的五种情况(1)if引的主从句不可居于复合句句首。(2)Itissaid,(reported)⋯构中的主从句不可提前。例如：ItissaidthatPresidentJingowillvisitourschoolnextweek.(right)ThatPresidentJiangwillvisitourschoolnextweekissaid.(wrong)(3)Ithappens⋯,Itoccurs⋯构中的主从句不可提前。例如：Itoccurredtohimthathefailedintheexamination.(right)Thath
4、efailedintheexaminationoccurredtohim.(wrong)(4)Itdoesn’tmatterhow/whether⋯构中的主从句不可提前。例如：Itdoesn’tmatterwhetherheiswrongornot.(right)Whetherheiswrongornotdoesn’tmatter.(wrong)(5)含主从句的复合句是疑句，主从句不可提前。例如：第1页共7页Isitlikelythatitwillrainintheevening?(right)Isthatwillrainintheeveninglikely?(wrong)4.What与t
5、hat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)Thatsheisstillaliveisaconsolation.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：Iheardthathejoinedthearmy.(2)由what,whether(if)引导的宾语从句，例如：1)Shedidnotknowwhathadhapp
6、ened.2)Iwonderwhetheryoucanchangethisnoteforme.(3)动词＋间接宾语＋宾语从句。例如：Shetoldmethatshewouldacceptmyinvitation.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,determined,glad,
7、proud,surprised,worried,sorry,thankful,ashamed,disappointed,annoyed,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可以作为形式宾语It不仅可以作为形式主语，还可以作为形式宾语，而真正的宾语that从句则放在句尾，特别是在带复合宾语的句子中。例如：Wehearditthatshew
