2020-2021学年新教材高中英语Unit1Laughoutloud突破语法大冲关学案外研版选择性必修第一册

-1-Unit1LaughoutloudUnit1Laughoutloud[观察例句]1．Iwalkthroughthedoorsintothewaitingarea，wherethere'safamiliaratmosphereofboredomandtension.2．Peoplesituncomfortablyonplasticchairs，lookingthrougholdmagazines，allofwhichhavebeenreadhundredsoftimespreviously.3．InthemiddleofthisparticularsceneIspotasmallgirlwhoseankleistwiceitsnormalsize.4．Ispeakwiththeon­dutynurse，whotellsmethatLara'sparentsrushedhertothehospital...5．Scientificstudiesshowthatlaughterproduceschemicalstomakepeoplefeelbetter，whichmeansclowndoctorscanbehelpful.[归纳用法]一、限制性定语从句与非限制性定语从句概述1．限制性定语从句通常紧跟在先行词之后，对先行词起限制确定作用。从句和先行词的关系十分密切，两者之间一般不可用逗号隔开。Shehasfoundthenecklace(thatthat)shelosttwoweeksago.她找到了那条两周前丢失的项链。2．非限制性定语从句是对先行词的一个补充说明。没有它，主句也能独立存在；非限制性定语从句和先行词的关系不是很密切，两者之间用逗号隔开。Hehastwosisters，whowhoareworkinginthecity.他有两个姐姐，她们在城里工作。二、限制性定语从句和非限制性定语从句的区别除了在标点运用及从句的作用方面不同之外，这两类定语从句还有一些区别。1．关系词的选用不同限制性定语从句可以用关系代词who，whom，whose，that，which，关系副词when，where，why等引导，而非限制性定语从句不可用that或why来引导(上述引导词除了这两者以外均可用来引导非限制性定语从句)。Yesterdayheboughtanewcar