I could have come here a little earlier, but Im late because of the bad traffic.
must have done表示對過去已經發生過的情況的肯定推測,語氣較強。">
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      had done的用法總結

      回答
      瑞文問答

      2024-08-19

      could have done可以表示“過去本來能夠做某事而實際上沒有做”。如:
      I could have come here a little earlier, but Im late because of the bad traffic.
      must have done表示對過去已經發生過的情況的肯定推測,語氣較強。

      擴展資料

        may / might have done表示對已經發生過的情況的肯定推測,語氣稍弱。might have done還可表示“本可能做某事而實際上沒有做”。如:

      had done的用法總結

        She didn''t come on time. She may / might have missed the bus.

        He might have given you more help, but he was very busy then.

        should / ought to have done表示“本該做某事而實際上沒有做”,其否定形式表示“本不該做某事而實際上做了”,通常含有責備的意思。如:

        The flowers have died. I should / ought to have watered them often.

        You shouldn''t / ought not to have told them the truth.

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          may / might have done表示對已經發生過的情況的肯定推測,語氣稍弱。might have done還可表示“本可能做某事而實際上沒有做”。如:

        had done的用法總結

          She didn''t come on time. She may / might have missed the bus.

          He might have given you more help, but he was very busy then.

          should / ought to have done表示“本該做某事而實際上沒有做”,其否定形式表示“本不該做某事而實際上做了”,通常含有責備的意思。如:

          The flowers have died. I should / ought to have watered them often.

          You shouldn''t / ought not to have told them the truth.