狀語從句和定語從句的區別

  狀語從句:

  時間狀語從句

  引導詞:when,while,as,after,before,since,until,as soon as,before,after.

  When you think you know nothing, then you begin to know something.

  地點狀語從句

  where,wherever引導。地點狀語從句與定語從句的`區別,where引導定語從句時,從句前應有一個表示地點的名詞作先行詞;而狀語從句前則無需先行詞。

  原因狀語從句

  Tom was late because he was badly ill yesterday.

  引導詞有because, as, since, for,seeing (that), now (that), considering (that),in that

  條件狀語從句

  引導詞:if,unless,on condition that

  If you want to know how old a woman is, ask her sister-in-law.

  If引導的真實條件句,虛擬條件句條件狀語從句中主句使用將來時態,而從句用一般現在時或現在完成時。

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