Must have p.p. 用法

作者:

 表達對過去事件的「肯定推測」，則用 must + have + p.p. 表示

Must have p.p. 例句

  1. She must have forgotten about the meeting.　她一定是忘記了會議。
    （根據她沒出現，可以推測她忘記了。）
  2. He must have gone home already.　他一定已經回家了。
    （根據他現在不在這裡來推測。）
  3. You must have worked really hard on this project.
  4. 　你一定為這個專案付出了很多努力。
    （從成果看得出來的推測。）
  5. They must have missed the train.　他們一定錯過了火車。
    （因為他們還沒來。）
  6. It must have rained last night — the ground is wet.　昨晚一定下雨了——地是濕的。
    （根據目前地面濕滑的狀況來判斷。）

助動詞 have p.p.

結構用法推測強度例句
must have + p.p.高度肯定的過去推測非常高He must have left already.
might/may have + p.p.可能發生過中等He might have left already.
can’t/couldn’t have + p.p.肯定沒發生過高度否定He can’t have left already.

教甄國考經濟特考試題

 In the morning the streets were flooded. There ______ a cloudburst during the night.

(A) must have been (B) has been (C) must be (D) must to be

Ans: A (114台南國小教甄第一題)

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