,something,everything,anything,nothing,none等代词时。如:Youshouldhandinallthatyouhave.4.先行词前面有theonly,thevery,any,few,little,no,all,much,every等修饰时。如:Theonlythingthatwecandoistogiveyousomemoney.5.先行词既有人又有物时。如:Doyouknowthethingsandpersonsthattheyaretalkingabout?6.主句的主语是疑问词which时。如:Whichisthebikethatyoulost?7.如果有两个从句,其中一个关系代词已用which,另一个关系代词宜用that。如:Edisonbuiltupafactorywhichproducedthingsthathadneverbeenseenbefore.8.当先行词在主句中作表语,而关系代词在从句中作表语时。如:Myhomevillageisnolongertheplacethatitusedtobe.二、当先行词指物或前面整句话时,定从关系代词必须用which的情况:在非限制定语从句中Helenwasmuchkindertoheryoungestsonthantotheothers,which,ofcourse,madetheothersenvyhim.2.当动词短语中的介词提前时ThisisthehouseinwhichLuXunoncelived.★_______lifehasdevelopedgradually.A.thatB.whichC.whereD.whoseC【解析】考查定语从句。,虽然被theonly修饰,但是其在定从中充当地点状语,故选where引导定从,而不是that。介词+关系代词引导的定从难点二