1)在关系副词引导的定语从句中,关系副词when,why和where可以转化为介词+关系代词,例如:•Thisisthehouse________Ilivedtwoyearsago.•Doyouremembertheday______________youjoinedourclub?•Isthisthereason______________herefusedouroffer?介词+关系代词引导的定语从句where/inwhichwhen/onwhichwhy/forwhich2)某些和动词搭配的介词可以提前介词+关系词引导的定语从句Isthistheplay____________youweretalkingaboutjustnow?(which/that)Isthistheplay___________youweretalkingjustnow?aboutwhich•Therate_______wildanimalsarebeingdestroyedhasincreased.Thisisourclassroom,__________________________thereisateacher’sdesk.1、根据先行词判断,所用的介词与先行词搭配atwhichinthefrontofwhich/where注意:如何判断介词3.Hereferredmetosomereferencebooks__________Iamnotveryfamiliar.注意:如何判断介词2.Thegirl______hehadfoughtforallhislifenolongerseemedimportanttohim.2、看定语从句中动词或形容词与介词的搭配3.Hereferredmetosomereferencebooks______Iamnotveryfamiliarwith.=Heistheman________Ithinkyoucandepend1.Heistheman_____Ithinkyoucandependon.=Thegirl_________hehadfoughtallhislifenolongerseemedimportanttohim.whomonwhomwhomforwhomwhich=Hereferredmetosomereferencebooks__________Iamnotveryfamiliar.withwhichIsthisthewatchthatyouarelookingfor?TheoldmanwhomIamlookingafterisbetter.在固定短语中介词不能提前下面两句中的介词能提前吗?注意:如何判断介词Air,________whichmancan’tlive,isreallyimportant.③根据定语从句所表达的意义来确定withoutThepen_____whichheiswritingnowwasboughtyesterday.with1)TheGermanboss___________theactressworksisakindperson.2)Thepenfriend__________thepoetwritesisgoodatliterature.forwhomtowhomMoreexercisesHaveyoumettheperson__________hewasspeaking?Heistheman_________youcanturnforhelp.Thefarm_________weworkedthenyearsagoisn’twhatitusedtobe.Thisisthetree___________weusedtoplaygames.Thepen__________heiswritingnowwasboughtyesterday.Thegas_____________wecannotliveiscalledoxygen.Moreexercisesaboutwhomtowhomonwhichunderwhichwithwhichwithoutwhich1.Thesungivesusheatandlight,________whichwecan’tlive.2.Thestudent____________whomweweretalkingjustnowisthebeststudentinourclass.3.I’llneverforgettheday___whichshesaidgood-byetome.4.1949wastheyear___whichtheP.R.C.wasfounded.withoutabout/to/withoninMoreexercises