高三英语定语从句人教实验版知识精讲.doc

用心爱心专心高三英语定语从句人教实验版【本讲教育信息】一.教学内容：定语从句［学习过程］一、定语从句及相关术语1.定语从句：修饰一个名词或代词的从句称为定语从句一般紧跟在它所修饰的先行词后面。2.关系词：引导定语从句的关联词称为关系词关系词有关系代词和关系副词。关系代词有thatwhichwhowhomwhoseas等；关系副词有wherewhenwhy等。关系词常有3个作用：①引导定语从句。②代替先行词。③在定语从句中担当一个成分。二、关系代词引导的定语从句1.who指人在从句中做主语（1）TheboyswhoareplayingfootballarefromClassOne.（2）YesterdayIhelpedanoldmanwholosthisway.2.whom指人在定语从句中充当宾语常可省略（1）Mr.Liuistheperson（whom）youtalkedaboutonthebus.（2）Mr.Lingisjusttheboy（whom）Iwanttosee.注意：关系代词whom在口语和非正式语体中常用who代替可省略。（3）Theman（who/whom）youmetjustnowismyfriend.3.which指物在定语从句中做主语或者宾语做宾语时可省略（1）Footballisagamewhichislikedbymostboys.（2）Thisisthepen（which）heboughtyesterday.4.that指人时相当于who或者whom；指物时相当于which。在宾语从句中做主语或者宾语做宾语时可省略（1）Thenumberofthepeoplethat/whocometovisitthecityeachyearrisesonemillion.（2）Whereistheman（that/whom）Isawthismorning?注意：当关系代词做介词的宾语而介词又提前时不能省略此时不能用that/who只能用whom/which（见后）。5.whose通常指人也可指物在定语从句中做定语（1）Hehasafriendwhosefatherisadoctor.（2）Ioncelivedinahousewhoseroofhasfallenin.whose指物时常用“名词+ofwhich”结构来代替（3）Theclassroomwhosedoorisbrokenwillsoonberepaired.（4）Theclassroomthedoorofwhichisbrokenwillsoonberepaired.三、介词+关系代词引导的定语从句关系代词在定语从句中做介词宾语时从句常由介词+关系代词（只用whom/which）引导（1）Theschool（that/which）heoncestudiedinisveryfamous.（2）Theschoolinwhichheoncestudiedisveryfamous.（3）TomorrowIwillbringhereamagazine（that/which）youaskedfor.（4）TomorrowIwillbringhereamagazineforwhichyouasked.（5）We’llgotohearthefamoussinger（whom/that/who）wehaveoftentalkedabout.（6）We’llgotohearthefamoussingeraboutwhomwehaveoftentalked.注意：1.一些固定短语不能拆开使用（拆开后会发生歧义）如：lookforlookaftertakecareofcareforseeto等（1）Thisisthewatch（which/that）Iamlookingfor.（T）（2）ThisisthewatchforwhichIamlooking.（F）2.若介词放在关系代词前关系代词指人时用whom不可用who或者that；指物时用which不能用that且不能省；关系代词是所有格时用whose（1