在非限制性定语从句中:Maryhasawatch,whichisveryprecious.在介词后:Thisisanoldhouseinwhichlivesanoldlady.当主句中的主语被that修饰时:ThatdogwhichIfoundinthestreetbelongstoTom.当关系代词后面带有插入语时:HereistheEnglishgrammarbookwhich,asIhavetoldyou,willhelpimproveyourEnglish.I'veboughtyousomebookswhich,Ithink,mayintrestyou.当先行词为整个句子时,也只能用关系代词which:Hepassedtheexameasily,whichmadehimveryhappy.OurfootballteamhasbeatenJapan,whichshockedallofus.Exercises:(Pleasefillintheblankswithcorrectrelativewords.)1,Thisthefirstbicycle____I'vebought.2,Doyouhaveanything____isimportanttosharewithus?3,Thetime______IspentonmathsismuchmorethanonEnglish.4,Wevisitedtheveryfactory_______makestoysforchildren.5,Hedidn'tcometowork,_______worriedhisboss.6,LiLeivisitedthefactory_____hisfatheronceworkedin.7,I'llneverforgetthedays____wespenttogetherinthecountryside.8,I'vetoldhimthenews_____,Ithink,willmakehimhappyallthetime.Keys:1,that;2,that;3,that/which;4,that;5,which;6,which/that;7,that/which;8,which