江群英语法课件主语从句

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1、GrammarNounClausesastheSubjectJiangQunyingChongqingchaoyangmiddleschool主语表示句子主要说明的人或事物，一般由名词、代词、数词、不定式、动名词等充当。如果是一个从句在复合句中充当主语,那么这个从句就叫主语从句。（1）Thathefinishedwritingthecompositioninsuchashorttimesurprisedusall.（2）Whetherwewillgoforanoutingtomorrowremainsunknown.（3）Whowillbeourmonitorhasn'tbe

2、endecidedyet.（4）Whomwemuststudyforisaquestionofgreatimportance.（5）Whatcausedtheaccidentremainsunknown.Moreexamplesentences（6）Whateveryoudidisright.（7）Whosewatchwaslostisunknown.（8）Whatweneedistime.（9）Whatweneedaregooddoctors.小结:（1)引导主语从句连词有that,whether;连接代词：who,whom,whose;what(什么的事/话；所...的)

3、,which哪一个/些，Whatever无论什么...,whoever无论谁,Whichever无论哪一个等；连接副词：when什么时候,where在哪里,Why为什么,how怎样，如何。在从今中作状语。另外，howmany,howmuch,howoften,howsoon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数，但也有例外，如例9。注意：1.主语从句要求使用陈述句语序，而非一般疑问句语序。如：.Howwashesuccessful？Howhewassuccessfulisstillapuzzle2.that和what都可引导主语从句。what除起连

4、接作用外，还在名词性从句中充当某些成分，可作从句的主语、宾语或表语。而that在名词性从句中不充当任何成分，无词义，只起连接词作用。如：Whathewantsisabook.Thatlighttravelsinstraightlinesisknowntoall.3.引导主语从句，不能用if，只能用whether。如：Whetherwewillholdapartyintheopenairtomorrowdependsontheweather.4.whatever,whoever在主语从句中不含疑问意义。它引导主语从句，并在从句中作主语、宾语、表语等。whatever=anyth

5、ingthat;whoever=anyonewho。如：Whoeverbreaksthelawshouldbepunished.5.为了防止句子头重脚轻，由连词that引导的主语从句，在大多数情况下会放到句子的后面，而用代词it作形式主语。（1）Itiscertainthathewillwinthematch.（2）Itistruethathehasmadeaveryimportantdiscoveryinchemistry.常见用it作形式主语的复合句结构：Itisafact(agoodidea/apity/ashame/nowonder/goodnews…)that…It

6、’sapitythatyoumissedthefilm.Itisreported(well-known/hoped/thought/expected/said/believed/decided/suggested/ordered…)that…Itissaidthathewaskilledintheearthquake.3)Itseems(happened/appears/doesn’tmatter/makesnodifference/…)that…Itseemsthattheywillwinthegame.Itmakesnodifferencewhetherhewillatt

7、endthemeetingornot.4)Itisnecessary/(clear/true/strange/important/wonderful/possible/likely…)that…需要注意的是，这类主语从句中，谓语动词很多为“(should)＋动词原形”，即要用虚拟语气。如：Itisnecessarythatyou(should)masterthecomputer.________we’llstarttomorrowwillbetoldsoon.(2)__________wecanbuyo