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1、(教师版)华夏英才辅导班——内部复习习题及解题方法名词性从句之主语从句一、名词性从句概述:在句子中起名词作用的各种从句统称为名词性从句。根据它们在句中的语法作用,这类从句又可分为主语从句、同位语从句、表语从句和宾语从句。 二、主语从句定义:在句中起主语作用的从句称为主语从句。引导主语从句的连接词主要有:单纯连词(that,whether/if)、连接代词(what,whatever,who,whoever,whom,whose,which,whichever等)和连接副词(when,where,why,how,whenever,wherever,h
2、owever等)。1)that引导的主语从句(1)由连词that引导的主语从句:引导词that无含义/在句中不做成分/不可以省。例如:Thatyouwillwinthemedalseemsunlikely.你能得奖看起来不大可能。Thatlighttravelsinstraightlinesisknowntoall.众所周知,光沿直线传播。Thatyoudon’tlikehimisnoneofmybusiness.你不喜欢他不管我的事。(2)形式主语it替代主语从句位于句首,that引导真正的主语从句会放到句子的后面。常用的句式主要有如下几种:1.
3、It+系动词+形容词+that从句。如:Itisnecessarythat…有必要……Itisclearthat…很清楚……Itislikelythat…很可能……Itisimportantthat…重要的是……类似的形容词还有:strange;natural;obvious;true;good;wonderful;possible;unlikely;quite;unusual;certain;evident;worth-while;surprising;interesting;astonishing,etc.例如:Itwasreallyaston
4、ishingthatherefusedtotalktoyou.Itisessentialthatheshouldbeherebytheweekend.Itseemsobviousthatwecannotgoonlikethis.Itisnecessarythatyou(should)masterthecomputer.ItisimportantthatastudentlearnEnglishwell.It’sclearthattheybadlyneedhelp.62013/06/10(教师版)华夏英才辅导班——内部复习习题及解题方法Itislike
5、lythatahurricanewillarrivesoon.知识拓展:在“Itisnecessary/important/surprising/strange/unthinkable/unbelievable/incredible+that从句”这类主语从句结构中,从句中谓语动词常用“(should)+动词原形”,形式,即要用虚拟语气,should可省略。例如:Itisnecessarythatacollegestudent(should)masteroneortwoforeignlanguages.大学生掌握一两门外语是有必要的。Itisstr
6、angethatyou(should)trustJane.很奇怪你竟然相信简。另外,需要注意的是,it作形式主语代替主语从句时,要注意和as引导的定语从句的区别。试比较:ItwasreportedthattheUSwasundertheterroristattack.Aswasreported,theUSwasundertheterroristattack.(2)常见用it作形式主语的复合句结构2.It+系动词+名词+that从句如:Itisafactthat…事实是……Itisgoodnewsthat………是好消息Itisaquestiontha
7、t………是个问题Itiscommonknowledgethat………是常识类似的名词还有:apity;awonder;agoodthing;nowonder;surprise等。例如:Itisamysterytomehowitallhappened.Itiscommonknowledgethatthewhaleisnotafish.ItisnosurprisethatBobshouldhavewonthegame.It’sapitythatyoumissedthefilm.3.It+be+动词的过去分词+that从句如:Itissaidthat…据
8、说……Itisreportedthat…据报道……62013/06/10(教师版)华夏英才辅导班——内部复习习题及解题方法