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1、ThePredicativeClause表语从句Definition在复合句中起名词作用的从句叫做名词性从句。它包括主语从句、宾语从句、表语从句和同位语从句。Thattheearthturnsaroundthesunisknowntoall.Iwanttoknowwhether(if)hehaspassedthechemistry.Thetroubleisthathehasneverdonetheworkbefore.Thenewsthattheplanewouldtakeoffontimemadeeverybodyhap
2、py.主语从句宾语从句表语从句同位语从句PredicativeClause在复合句中做表语的从句，叫做表语从句。它位于主句的系动词am,is,are,was,were,seem,look,taste,remain等之后，对主语进行解释，说明，使主语的内容具体化。Thequestioniswhowilldoit.表语从句放在连系动词之后，充当复合句中的表语。Thequestioniswhowilldoit.Thequestionisdifficult.（表）表语从句（表）可接表语从句的系动词有：1.be2.feel,seem
3、,look,appear,sound,taste,smell3.stand,lie,remain,keep,stay4.become,get,grow,turn,go,come,run,fall5.prove,turnout1.这个故事听起来像是真的。Thestorysoundstrue.2.他似乎知道这件事。Heappearstoknowthis.例句：3.这些桔子很好吃。Theseorangestastegood.1.ThisisanEnglish-Chinesedictionary.2.Thedinnersmells
4、good.3.Hefellinlove.4.MyjobistoteachyouEnglish.5.Thequestioniswhowilldoit.2.表语从句的构成主语+系动词+引导词+简单句Thisiswhyhedidit.表语从句放在连系动词之后，充当复合句中的表语。Hissuggestionisthatweshouldstaycalm.Thatiswhyshewaslate.引导词引导词（系动词）+引导词+简单句（主语）+WhatIwanttosayisthatIamtired主语+系动词+引导词+简单句观察思考：
5、指出句子成分HenrywasanAmericanbusinessman.HenrymetanAmericanbusinessman.主语表语主语谓语宾语（及物动词）连系动词1.从属连词as,asif/though引导的表语从句Helookedjustashehadlookedtenyearsbefore.Itsoundsasifsomeoneisknockingatthedoor.他看起来还与十年前一样。听起来好像有人在敲门。引导词的用法（一）asif/though引导的表语从句常置于连系动词look,seem,sound
6、,be,become等后面，常用虚拟语气，表示不存在的动作或状态。e.g.Itsoundsasif/thoughsomebodywasknockingatthedoor.主语+连系动词（look/seem/appear…）+that/asif从句asif,asthough引导的表语从句*asif/asthough引导的表语从句如果是事实，就用陈述语气，如果与事实不符，就用虚拟语气(主句一般现在时，从句就用一般过去时，be变成were。主句是一般过去时，从句用过去完成时)。Itlooksasifhewereherownfat
7、her.(与事实不符)Darkcloudsaregathering.Itlooksasifit’sgoingtorain.becausebecause引导表语从句通常用于“This/That/Itisbecause…”结构中。而且主语一般不用reason。Myangerisbecauseyouhaven’twrittentomeforalongtime.Whywereyouabsentfromthemeeting?Wasitbecauseyouwereill?你为什么不来出席座谈会？是病了么？引导词的用法（二）that,w
8、hy与because引导表语从句时的区别三者均可引导表语从句，但that没有词义，而why和because有自己的意思；另外，前者强调结果，后者强调原因。如：Thereasonwasthatyoudon’ttrusther.原因是你不信任她。Thefactisthattheyareangrywithea
