wanglei8873057
主语从句(Subject Clause) 定义:如果一个句子在复合句中充当一个主语,那么这个句子就是主语从句.It 作形式主语和it引导强调句的比较 It 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： It is a pity that you didn’t go to see the film.
shiyeyouyou
语从句(SubjectClause)定义:如果一个句子在复合句中充当一个主语,那么这个句子就是主语从句.第一部分：常规主语从句，即句子在复合句中充当一个主语（1）Thathefinishedwritingthecompositioninsuchashorttimesurprisedusall.（2）Whetherwewillgoforanoutingtomorrowremainsunknown.（3）Whowillbeourmonitorhas'tbeendecidedyet.（4）Whomwemuststudyforisaquestionofgreatimportance.（5）Whatcausedtheaccidentremainsunknown.（6）Whateveryoudidisright.（7）Whosewatchwaslostisunknown.（8）Whatweneedistime.（9）Whatweneedaregooddoctors.小结:（1)引导主语从句连词有that,whether,who,what,whatever等（2)连词位于句首不能省略（3)主语从句大多数情况下视为单三,但也有例外,如例9第二部分：为了防止句子头重脚轻，通常把形式主语it放在主语位置，真正主语搁置于句末（1）Itiscertainthathewillwinthematch.（2）Itistruethathehasmadeaveryimportantdiscoveryinchemistry.（3）Itisverylikelythattheywillholdameeting.（4）Itisstrangethatheshoulddothat.（5）Itisimportantthatweallshouldattendthemeeting.（6）Itisstrangethatthemanshouldhavestucktohissillyideas.（7）Itisapitythatwewon'tbeabletogotothesouthtospendoursummervacation.（8）Itisstillamysterywhatcausedtheaccident.（9）Itissaidthathehasgonetoshanghai.(=Heissaidtohavegonetoshanghai)（10）ItisknowntoallthatthegunpowderwasfirstinventedbytheChinese.（11）Itissuggestedthattheworkshouldbedonewithgreatcare.（12）Itseemsthathehasseenthefilm.(=Heseemstohaveseenthefilm)（13）Ithappenedthatthetwocheatswerethere.(=Thetwocheatshappenedtobethere)小结:（1)以that引出的主语从句,常以形式主语it引导.Itis+形容词/名词/某些动词ed+that从句.（2)在有些that从句中要用虚拟语气(should+do/should+havedone)例句4,5,6,11.
晃晃悠儿
从句,就是用来描述句子成分特征的短句，分为前置和后置。主语从句一般只有后置，就是将从句放在主语的后面，加以修饰主语的特征，一般用who引导。例如：lilywhoisahighschoolstudenthasherowncompany.基本成分是lilyhasherowncompany。从句是who（lily）isahighschoolstudent
1144177586丫头
主语从句就是一个句子作主语~如:(That Mary married Jack) surprised everyone 括号内容为主语从句,主句的谓语是surprise~~宾语补足语如:to have my hair cut 而cut就是宾语我的头发的补足语
