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1、U4主语从句一、主语从句的定义二、引导主语从句的关联词三、主语从句三要素四、主语从句的注意问题五、练习RelatedConception(相关概念)1.名词:表示人或事物的名称的词叫名词。2.名词在句子当中一般可以作什么成分?名词在句中主要作主语、宾语、表语和同位语。TeboyisliMing.主语表语Mr.Liang,a24-year-oldboy,teachesusEnglish.主语同位语宾语在英语的句子结构中，本来该由名词充当的主语、宾语、表语和同位语，由一个句子来充当,这个句子就叫名词性从句。什么是名词性从句?名词性从句主语从句(TheSubje
2、ctClause)宾语从句(TheObjectClause)表语从句(ThePredicativeClause)同位语从句(TheAppositiveClause)Grammar3.Tofindyourwaycanbeaproblem.Whatpartdoestheunderlinedpartserveasineachsentence?2.Smokingisbadforyou.1.Youareastudent.4.“Howdoyoudo?”isagreeting.5.Whatshesaidisnotyetknown.6.Thatweshallbelatei
3、scertain.7.Itiscertainthatweshallbelate.subjectAsentenceservingassubjectiscalledSubjectClause.主语从句主语从句充当主语的句子叫主语从句Howthebookwillselldependsonitsauthor.Thatheisthebeststudentintheclassisobvious.Howyougotmeblindisstillamystery.Thatshewonthegamemadeherveryhappy.Whathesaidisnottrue.Wh
4、attheyneedisadictionary.结论主语从句多位于_____________句首主语的位置Trytodrawaconclusion.Whowillgomakesnodifference.Whichisthebestisnotcertain.Whydinosaursdiedoutisstillunknown.Whenwewillgettogetherhasnotbeendecided.Howshecankeephealthyisasecret.Whetherhewillcomeisnotveryimportant.WhowillgoWhich
5、isthebestWhydinosaursdiedoutWhenwewillgettogetherHowshecankeephealthyWhetherhewillcome找出主语从句引导主语从句的关联词有三类：1)从属连词that如:Thattheyweretruesisterswasclearfromthefacialresemblancebetweenthem.很明显,她们确是亲姐妹,她们的脸型很相似。NOTE:that不可省，无意义，起连接作用；从句结构完整。2)从属连词whetherWhetherhe’llcomehereisn’tclear.他
6、是否会来这里还不清楚。3)连接代词who,whom,whose,what,which,whoever,whatever,whichever,连接副词where,when,how,why。Whatshedidisnotyetknown.她干了什么尚不清楚。Howthishappenedisnotcleartoanyone.这事怎样发生的,谁也不清楚。Whoevercomesiswelcome.不论谁来都欢迎。4)有时用it作形式主语，将主语从句后置,这样做是为了避免句子头重脚轻。常用句型如下：It+be+名词+that从句It+be+形容词+that从句It
7、+be+动词的过去分词+that从句It+be+不及物动词+that从句@由that引导的主语从句有时为了使句子结构平衡,避免“头重脚轻”,常用it作形式主语,而把从句放在后面。例如:1.Thathewillrefusethispieceofadviceisimpossible.______________________________________________________________________________2.Thattheyshouldlikeeachotherisnatural.________________________
8、_____________*it为形式主语Itisnaturalt
