prep.+which/whomThisistheboy.Iplayedtennis_____theboyyesterday.Thisschoolisveryfamous.Heoncestudied____thisschool.withinThisistheboywhom/that//whoIplayedtenniswith.Thisschoolwhich/that/heoncestudiedinisveryfamous.within\\\preposition+which(指物)preposition+whom(指人)Howtochoosetherightprepositions介词+关系代词1.Doyoulikethebookshespent$10?2.Doyoulikethebookshepaid$10?3.Doyoulikethebooksheoftentalks?onwhichforwhichaboutwhich观察以下句子1)根据定语从句中谓语动词或形容词的习惯搭配来决定。ConclusionTestyourself1.Thesubject_________MaryisinterestedisPhysics.2.Ican’tfindmydictionary___________Ipaidover$100.3.Thisisthegoodcar_______Ispentallmymoney.4.Theteacher________youhavebeenwaitingiscominginaminute.MorePracticeinwhichforwhichonwhichforwhom(isinterestedinthesubject)(pay…forthedictionary)(spendmoneyonthecar)(waitingfortheteacher)I’llneverforgettheday.Hemadethespeechonthatday.Themoment_____whichImadethedecisionisexciting.______themoment(在此刻)atatI’llneverforgetthedayonwhichhemadethespeech.2)根据先行词的搭配习惯来决定。Testyouselves1.Thisistheknife______________Iusuallycutmypencil.2..Isthisthehousewhichyourfatherwasborn?withwhich∧inAir,________whichmancan’tlive,isreallyimportant.③根据从句中动词与先行词的逻辑关系来确定withoutThepen_____whichheiswritingnowwasboughtyesterday.with1)Thefilm_____________Ifellasleepwasveryboring.2)Theheadmasteristheperson_________Igotthecup.3)Thegas_______________wecannotliveiscalledoxygen.duringwhichfromwhomwithoutwhich下面两句中的介词能提前吗?Isthisthewatchthatyouarelookingfor?TheoldmanwhomIamlookingafterisbetter.在固定短语中介词不能提前固定搭配的动词短语中的介词一般不能提前.常见的这类动词短语有:lookat/forwardto,laughatcarefor(照顾,喜欢)hearof/about/from,takecareof等.