1\ I don't know the reason why she is late,

3个回答

  • 第一个是定语从句~

    第二个是同位语从句~

    同位语是名词性从句~简单说就是解释说明前一个名词的内容的

    1 I don't know the reason why/ for which she is late.(在定语从句中做原因状语 )

    只是说她迟到的原因,但还是没有说出原因的内容

    eg.I don't believe the news that he gave us (定语从句)

    I don't believe the news that ants could fly (同位语从句)

    2 I have no Idea when he will be back .

    he will be back 是when引导的同位语从句,其先行词idea则不是表示时间的名词,我没有想法(想法是针对他会不会回来的~是说明内容的)

    希望帮到lz~