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1、ThestatementofNominalClausesLiubaMiddleSchoolMengWeiwhether和if都可以引导宾语从句1.当whether后紧跟or/ornot时,不用if.Idon’tknowwhetherIwillstayornot.2.介词后面的宾语从句不能用if.SomethingshouldbepaidattentiontoIdon’tknowwhetherornotshe’lllikeit.Everythingdependsonwhetheritisfinetomorrow.Iworryabo
2、utwhetherIhurtherfeelings.3.复合不定式只能用whether.告诉我是去是留4.习惯上作discuss的宾从只用whether.但:宾语从句否定时常用if引导.他问你是否去见他WediscussedwhetherweshouldholdameetingTelluswhethertogoorstayhere.Heaskedifyouwouldnotgoandseehim.我们讨论了是否要召开一个会议以it作形式主语，把主语从句后置的常用句型有：1.It+be+形容词+that从句certainclear
3、importantnecessaryprobablepossibleItis/wasthat–clause（1）她会考好是肯定的了Itiscertainthatshewilldowellinherexam.（2）他告诉我一切是可能的Itisprobablethathetoldmeeverything.2、It+be+名词词组+that从句pityshameduty(1)Itisapitythatwecan’tgo.(2)Itisnosurprisethatourteamshouldhavewonthegame.Itis/wasa
4、that–clause3、It+be+过去分词+that从句saidreportedthoughthopedbelievedknownthat–clauseItis4、It+seem,happen,appear等不及物动词+that从句。(1)看起来爱丽丝根本不能去舞会ItseemsthatAliceisnotcomingtothepartyatall.IthappenedthatIwasoutthatday.(2)碰巧我那天外出表语从句在句中作表语的句子叫表语从句。引导表语从句的关联词与引导主语从句的关联词大致一样，表语从句位
5、于连系动词后，有时用asif,because引导。其基本结构为：主语+系动词+that从句.Thisisbecausehemissedthetrain这是因为他没赶上火车当主语为it,that,this时,because可以引导句子,出现在表语的位置上.否则,because应引导原因状语从句.Itisbecauseweareclosertothesuninsummer.这是因为我们夏天离太阳近Thisisbecausehebrokethelaw.这是因为他违法了引导表从他来晚的原因是他差一分钟没赶上火车Thereasonwhyh
6、ewaslatewasthathemissedthetrainbyoneminutethismorning.需要注意的是，当主语是reason时，表语从句要用that引导而不是because。限制性定语从句Thereasonofhisabsenceisthathestayeduptoolatethenightbeforeandcouldnotgetupthatmorning.他缺席的原因是前天睡的太晚早晨没起来Thereasonwhyhewaslatewasthathegotuplate.他来晚的原因是他起床晚了表语从句的引导词
7、与主语从句和宾语从句相同.但:1.that引导表语从句时不能省.2.if不能引导表语从句.3.seem,appear后可接that引导的从句,而look则不可.这三个词后都可用asif/asthough引导从句.Itseems/appearsthathewaslateforthetrainyesterday.Itseems/appears/looksasifwehavetogohomeonfoot.功能例词从属连词只起连接作用，不充当从句中的任何作用。that,whether,if，asif（只用于表词从句）连接代词既起连接作用
8、，本身又做从句的主语、宾语、表语或定语。Who,whom,whose,what,which连接副词既起连接作用，本身又做从句的状语。when,where,why,how用how组成的词组，如：howmany,howmuch引导名词性从句的引导词归纳起来可分为以下
