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1、.-表语从用法1.定义：用作表语的从句叫做表语从句2.引导表语的从句的关联词的种类（1）从属连词that.ThetroubleisthatIhavelosthisaddress.Thereasonwasthathewaslateforschool.(2)从属连词whether,as,asifHelookedjustashehadlookedtenyearsbefore.Thequestioniswhethertheywillbeabletohelpus.注：从属连词if一般不用来引导表语从句，但asif却可引导表语从句。Allthisw
2、asovertwentyyearsago,butit’sasifitwasonlyyesterday.Thekeyiswhetherwecansolvetheproblem.Itlookedasifitwasgoingtorain.注：能跟表语从句的谓语动词一般为系动词be,seem,look,sound等Helookedjustashehadlookedtenyearsbefore.Itsoundsasifsomeoneisknockingatthedoor.(3)连接代词who,whom,whose,what,which,whoev
3、er,whatever,whichever在表语从句中做主语、宾语等。Theproblemiswhowecangettoreplaceher...word.zl-.-Thatwaswhatshedidthismorningonreachingtheagreement.Myquestioniswholeft.(4)连接副词where,when,how,whyWhatIwonderiswhenheleft.Thisiswheretheyoncelived.Thatiswhyhedidn’tehere.Thequestionishowhedi
4、dit.(5)连词because可引导表语从句。注意：because可引导表语从句，但与之同义的since,as,for等不用于引导表语从句。Ithinkitisbecauseyouaredoingtoomuch.It’sjustbecausehedoesn’tknowher.That’sbecausehedidn’tunderstandme.(That’sbecause…强调原因)That'swhyhegotangrywithme.(That’swhy…强调结果)注意：在一些表示“建议，劝说，命令”的名词后面的表语从句中，谓语动词用虚
5、拟语气.Should+动词原形表示，should可省略。Mysuggestionisthatwe(should)startearlytomorrow.一坚持（insisit）二命令（mand,order）三建议（suggest,advise,propose）四要求（desire,demand,require,request）四．注意事项（重点看）1.表语从句要用陈述语序。Thatiswherethefamousscientistwasborn...word.zl-.-Thisiswhysheissohappytoday.2.that和w
6、hat在引导的表语从句that本身没有词义，在句中只起连接作用，不充当句子成分；what则表示“所…的（人或事）”，在表语从句中充当主语或宾语等。Thatfacetisthatmorethanseventypercentoftheearth’ssurfaceiscoveredbywater.Whathetoldyouwaswhathadbeendiscussedatthemeeting.3.if与whether均意为“是否”引导的表语从句是，只能用whether，不能用if。Thequestioniswhetherwecanfinish
7、ourworkbytomorrowevening.4.语气（1）主语为advice,order,idea,notion,proposal,suggestion,request等一些表示“建议，劝说，命令”的名词，之后的表语从句中，谓语动词用虚拟语气。Should+动词原形表示，should可省略。Mysuggestionisthatwe(should)startearlytomorrow.Ouronlyrequestisthatthisshouldbesettledassoonaspossible.(2)asif/though引导的表语
8、从句时，从句谓语多用虚拟语气。这是因为从句中的情况与事实不相符。..word.zl-.-具体来说，如果从句表示与现在事实相反，谓语动词用一般过去式；如果从句表示与过去事实相反，谓语动词“had+done”,
