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1、名词性从句——表语从句龙门县永汉中学陈伟均一.相关概念1.名词：表示人或事物的名称的词2.名词的句法作用：名词在句中通常充当主语,宾语,表语和同位语。3.名词性从句：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，现在由一个句子来充当,所以这个句子就叫:名词性从句。主语从句表语从句宾语从句同位语从句名词性从句主语表语宾语同位语①②③定语从句状语从句英语从句Thequestionisdifficult.Thequestioniswhenhecanarriveatthehotel.请分析句子结构：主语系动词表语句子结构：主语+系动词+表语主语系动词一个从句表语从句充当表语连接词
2、Thequestioniswhenhecanarriveatthehotel.从句在整个复合句中作充当表语成分，所以叫表语从句。结构：主语+系动词+连接词+表语从句主语系动词表语从句连接词可以接表语从句的系动词通常有：1：be（am,is,are,was,were,being,been)2:feel,seem,look,appear,sound,taste,smell(感官动词）3:stand,lie,remain,keep,stay4:become,get,grow,turn,go,come,run,fall连接词：that/whether/asif/asthough(if不引导表语从句
3、)连接代词：who/whom/whose/which/what连接副词：when/where/why/how/becauseThequestioniswhetherwecanrelyonhim.Thatisbecausewewereinneedofmoneyatthattime.Helookedasifhewasgoingtocry.That’swhyIwaslate.ThetroubleisthatIhavelosthisaddress.Thatwaswhatshedidthismorningonreachingtheattic阁楼.because，why引导的表语从句。That'sbe
4、causehedidn'tunderstandme.（That‘sbecause…强调原因）That'swhyhedidn’tunderstandme.（That'swhy…强调结果）填空:Thereasonwhywedidn'ttrusthimis______hehasoftenlied．reason做主语时，表语从句只能用that引导,不能用why引导。句型结构为：Thereason(why…/for…)is/wasthat….Thereasonisthat……why名词主语+be+that引起的表语从句在这种句型中，常用表示事实，真理的名词，或表示看法，观点的名词，如：fact,tr
5、uth,idea,opinion,belief,view,feeling,suggestion,plan等作主语。如：1.Thefactisthatourteamhaswonthegame.2.Thetruthisthatshewastheverypersonwhoinformedagainstherhusband.3.Myopinionisthatweshoulddiscussitwiththem.使用虚拟语气的表语从句在表示建议、劝告、命令、请求、要求含义的名词后的表语从句，谓语动词需用“should+动词原形”表示，should可省略。常见的词有：advice，suggestion，
6、order，proposal，request,plan，idea等。如：Mysuggestionisthatwe（should）startearlytomorrow.Theirplanisthattheyshouldbuildanewfactoryintheirhometown.Thedemandisthatthecomposition(should)bewrittenononesideonly.Myideaisthatwe(should)getmorepeopletoattendtheconference.注意：在as if, as though等引导表语从句中,表示与事实相一致时,要用
7、陈述语气。如：It looks as if we’ll be late.看起来我们似乎要迟到了。This meat tastes as if it has already gone bad.这肉吃起来似乎已经坏了。精典名题When a pencil is partly in a glass of water, it looks as if it _______. (NMET 95)A.breaks B.has broke
