介词加关系代词定从

foreignoilaregoneforever.关系副词whenTherewasatime_____thebusinessmanlostheart.when=onwhichwhen=onwhichwhen先行词是表示原因的名词,即reason,在定语从句中充当原因状语,用why,这时一般可以用for+which来代替:Idon’tknowthereasonwhy/forwhichhedidit.Thereasonwhy/forwhichhewasfiredwasnotclear.试比较:Thereason____________heexplainedtotheteacherisnottrue.Thereason___________wasexplainedtotheteacherisnottrue.(which/that)(作宾语)which/that(作主语)关系副词why先行词是position,situation,point,case,condition等时在定语从句中作状语用关系副词where连接.TheyareinsuchasituationwhereeverythingisindisorderThepolicearelookingintothecasewheretwoVIPswerekilled.Canyoumakeasentencewherethisverbcanbeused?Theywereatthepointwhere/atwhichtheyhadtodecidewhattodenext.Point2:介词的选用考虑三个因素:“一先,二动,三意义”etthedaysduringwhichIstudiedhard.etthedayonwhichIwenttocollege.ettheyearinwhichIwenttocollege.daysdayyear