Unit+9+Section+B+课件+2024-2025学年人教版英语九年级全册.pptxVIP

Unit9IlikemusicthatIcandanceto.人教版英语九年级全一册Unit9SectionB

一.定语从句的概念和先行词、关系词1.在复合句中修饰名词或代词的从句叫作定语从句；被定语从句修饰的名词或代词叫作先行词；定语从句一般放在先行词的后面起限定作用eg:Sheisthesinger(先行词）that(关系代词）Imetlastweek.2.引导定语从句的词叫作关系词，它包括关系代词who,whom,whose,that,which等和关系副词where,when,why等Grammar:定语从句

二.关系代词与关系副词的用法1.关系代词that:指人或物均可，指人时相当于who/whom,指物时相当于which,在定语从句中可做主语或宾语，做宾语时可省eg:Themanthat/whoisstandingbythedoorisherEnglishteacher.2.关系代词who:指人，在定语从句中做主语或宾语,注意关系代词whom也指人，在定语从句中只做宾语，一般可以与who互换，在口语或非正式文体中往往省略eg:(1)TheteacherwhoteachesusEnglishisfromtheUSA.(做主语）(2)Thelady(who/whom)heistalkingtoishisfriend.(做宾语）Grammar:定语从句

3.关系代词which：指物，在定语从句中可做主语或宾语，做宾语时可省略eg:(1)Weplantedtheflowerswhichdontneedmuchwater.(做主语）(2)Thevegetables(which)weboughtwerenotfresh.(做宾语）4.关系副词when：指时间，在定语从句中作时间状语,相当于介词+whicheg:I?still?remember?the?day?when?I?first?came?to?this?school.??????????=I?still?remember?the?day?onwhich?I?first?came?to?this?school.??Grammar:定语从句

5.关系副词where：指地点，在定语从句中作地点状语，相当于介词+whicheg:Shanghai?is?the?city?where?I?was?born.??=Shanghai?is?the?city?inwhich?I?was?born.?6.??关系副词why:?指原因，在定语从句中作原因状语，相当于for+whicheg:Please?tell?me?the?reason?why?you?missed?the?plane.??=Please?tell?me?the?reason?forwhich?you?missed?the?plane.?Grammar:定语从句

三.注意事项1.关系代词在定语从句中做宾语时，常可以省去；但做主语或做介词的宾语时，不可以省略eg:Noonelikesthepeoplewhotalkmuchbutdolittle.(做主语，不能省）2.关系代词做定语从句的主语时，应注意从句的主谓一致（看先行词）eg:(1)DoesTomknowtheteacherswhoareplayingfootball?*先行词teachers是复数，who在从句中做主语,因此，关系代词who指代复数，其后的谓语动词应用复数形式Grammar:定语从句

(2)Heistheonlyoneofthedoctorsinthehospitalwhohastwocars.*在“oneof+复数名词”结构中，通常复数名词是先行词，但在one前加theonly,则one是先行词，故从句谓语动词用has3.定语从句的引导词只用that,不宜用which的几种情况：（1)当先行词是all,everything,something,nothing,anything等不定代词，或是先行词被序数词以及形容词最高级修饰时eg:Shetakesawayeverythingthatbelongstoher.Grammar:定语从句

(2)当先行词为同时含有“人”和“物”的名词时eg:Icanstillrememberthepersonsandsomepictures(that)