摘要：如同位语从句意义不完整.需增加"什么时候"."什么地点"."什么方式"等含义.应用when,where,how等词引导同位语从句. 例1:I have no idea when he will be back. 析:he will be back意义不完整.应加"什么时候"的含义才能表达idea的全部内容.因此应用when引导同位语从句. 例2:I have no impression how he went home,perhaps by bike. 析:he went home意义不完整.应加"如何"的含义才能表达impression的全部内容.因此应用how引导同位语从句.

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