6、词,它只起连接作用且不可省略。实例:①Thenewsthatyoutoldmeyesterdaywasreallyexciting.②No one can deny the essential fact that the traffic problem over the last years has caused wide pubic concern all over the world.①句是定语从句,that在从句中作宾语,在意义上指代先行词news。②句是同位语从句,that没有任何意义,只起连接作用。引导词的区别2.引导
7、词when,where,why引导定语从句时,它们叫做关系副词,在从句中充当状语,可以转换成"介词+关系代词"的形式;引导同位语从句时,它们叫做连接副词,在从句中充当状语,但不能转换成"介词+关系代词"的形式People will alwayskeepinmindthe time when(=atwhich)Hong Kong and Macao returned to our motherland .Peopletrappedintheroomhadnoideawheretheywerewhentheyregainedawar
8、eness.Thejourneyaroundtheworldtooktheoldsailorninemonths,duringwhich(=when)thesailingtimewas226days.Forevergone arethe days when(