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《英语三大从句 三大笔记》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。
1、主语从句主语从句在复合句中作主句的主语。引导主语从句的词有连词that,whether;疑问代词who,what,which;疑问副词when,where,why,how.eg.Thathewillcomeiscertain.Whowillgomakesnodifference.Howthishappenedisnotclear.Whyhedidthatwasasecret.一、that引导的主语从句Athat引导主语从句时，不同于其他的连词，在主语从句中无任何意义，也不充当任何成分，只是单纯的连词，
2、通常不可以省略。eg.Thathewillsucceediscertain.Thathegotthefirstplaceistrue.B在通常情况下，that引导主语从句时，常用it作形式主语，而将that从句置于句尾。eg.Itiscertainthathewillsucceed.Itistruethathegotthefirstplace.C如果以that从句为主语的句子是疑问句，就只能用it作形式主语的结构。eg.Isitcertainthathewillcome?Isittruethathew
3、ouldtaketherisk?二、it作形式主语置于句首时的结构A“It+be+形容词+that从句”结构，常用于这种句型的形容词有:fortunate,possible,(un)likely,true,probable,strange,important,necessary,naturaleg.Itisstrangethatnoone(should)wanttogothere.Itislikelythathewillcome.B“It+be+名词词组+tha从句”结构，常用于这种句型的名词及名词词
4、组有：goodnews,commonknowledge,anhonor,apity,ashame,nowonder等.eg.Itiscommonknowledgethattheearthturnsaroundthesun.(It’s)nowonder(that)hegotthefirstplace.C“It+be+过去分词+that从句”结构，常用于这种句型的过去分词有：said,believed,reported,pointedout,proved,decided,suggested,advised
5、,insisted,requested，ordered,required等。eg.Itisreportedthattherewillbeastormthisafternoon.Itisdemandedthathe(should)leaveatonce.DIt+seems/happens等不及物动词+从句，如：Itturnedoutthat…结果eg.Itdoesn’tmatterwhether…Itmakesnodifferencetosbwhether…无论没区别Itoccurstosbthat…某
6、人想到Itstrikessbthat…Ithappensthat…碰巧eg.Itseemsthatitisgoingtorainsoon.Itnowappearsthattheyareintrouble.三、whether引导的主语从句eg.Whethershewillgothereisnotknown.WhetherIwillacceptthejobisnotdecided.从句置于句首时必须用whether引导，置于句尾时，有时if可以和whether交换。eg.It’suncertainwhet
7、her/ifhewillattendthemeeting.四、wh-疑问词引导的主语从句eg.Whatweneedisyourhelp.Whatshesaidisnottrue.Itisnotknownwhyhedidthis.五、-ever引导的主语从句whatever,whoever,whomever,whenever,wherever，语气比what,who,when等强烈。eg.WhateverIhaveisyours.Whoevercomeswillbewelcome.Summary(总结）
8、1.主语从句大多数情况下视为第三人称单数,但在what引导的主语从句后谓语动词的数要根据句意而定。eg.WhatIneedisadictionary.WhatIneedaretwomoreworkers.2.在有些that从句中要用虚拟语气eg.(should+do/should+havedone)。宾语从句宾语从句在句中起宾语的作用。它可以作动词的宾语、介词、某些形容词(如sure,glad,pleased等)的宾语。宾语从句可以由连词that,whe
