[文法] believed後面接的時態

[coldeye (coldeye)]

  例句：
  When I was a child, I believed that the earth was/is round.

  請問："the earth is round" is a fact.那麼於此例句中我要用was還是is?


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推 l10nel:根據從屬字句動詞隨著主句動詞時式調整的所謂backshift原則
→ l10nel:應該是was，雖然這是永恆的真理，不過也有人用is，不算錯