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18.5 介詞+關系詞
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1)介詞后面的關系詞不能省略。
2)that前不能有介詞。
3) 某些在從句中充當時間,地點或原因狀語的"介詞+關系詞"結構可以同關系副詞when 和where 互換。
  This is the house in which I lived two years ago.
  This is the house where I lived two years ago.
  Do you remember the day on which you joined our club?
  Do you remember the day when you joined our club?















 學習啦--英語語法大全