关系代词as的用法.ppt

《关系代词as的用法.ppt》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、as引导限制性定语从句和非限制性定语从句引导限制性定语从句多用于以下三个结构：such…as,thesame…as,as(so)…as，可以代替先行词是人或物的名词作主语、宾语、表语或状语等。Suchpeopleaswerementionedbyhimwerehonest.Ilikethesamebookasyoudo.I’veneverseensuchaclevermanasheis.Ishalldoitinthesamewayasyoudid.www.themegallery.comCompanyLogo2.such(so)…as引导定语从句而such(so)…that引

2、导结果状语从句。TheytalkedinsuchsimpleEnglishaschildrencouldunderstand.TheytalkedinsuchsimpleEnglishthatchildrencouldunderstandit.www.themegallery.comCompanyLogo3.thesame…that与thesame…as在意思上是不同的。ThisisthesamebagasIlostyesterday.(相似物)ThisisthesamebagthatIlostyesterday.(同一物)www.themegallery.comCompan

3、yLogo4.as也可单独使用，引导非限制性定语从句，作用相当于which。例如：Hewaslateforschool,as/whichwasusualwithhim．Ilivealongwayfromwork,as/whichyouknow.www.themegallery.comCompanyLogoas和which引导非限制性定语从句的区别1.as引导的非限制性定语从句位置较灵活,可以位于主句前面,中间或后面，一般用逗号与主句隔开,但which所引导的非限制性定语从句只能放在主句之后。Asisknowntoall,theearthisround.Theearthisro

4、und,asisknowntoall.Theearthisround,whichisknowntoall.www.themegallery.comCompanyLogoas和which引导非限制性定语从句的区别2.当主句是否定句时，只能用as。Spidersarenotinsects,asmanypeoplethink.www.themegallery.comCompanyLogoas和which引导非限制性定语从句的区别3.如果要说明两者有相似之处时通常用as,表达“正如（情形或事实所表示）的那样、像……的一样”的意思。Sheisafinesinger,ashermothe

5、rusedtobe．Asweknow,smokingisharmfultoone'shealth.www.themegallery.comCompanyLogoas和which引导非限制性定语从句的区别4.as代表前面的整个主句并在从句中作主语时,从句中的谓语必须是系动词;若为行为动词(happen除外),则从句中的关系代词只能用which。Hewasabsent，asisoftenthecase．Itrainedhardyesterday,whichpreventedmefromgoingtothepark.www.themegallery.comCompanyLogoas

6、和which引导非限制性定语从句的区别5.as所引导的从句所表达的语意须和主句一致，而which则无此限制。Shehasmarriedagain,aswasexpected．Shehasmarriedagain,whichwasunexpected．www.themegallery.comCompanyLogo