that 引導名詞子句作為主詞、主詞補語或同位語時，that不能省略
- That you did not come on time is a pity.
  你昨天沒有準時前來真是可惜。
that引導名詞子句作為受詞時，that常可省略。
- He told me (that) he fell in love.
  他告訴我他戀愛了。
that 引導名詞子句做為補語/同位語，that經常可以省略。
- It is sure (that) the earth moves around the sun.
  地球繞著太陽公轉是不變的。

標籤

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