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(单词翻译:双击或拖选)
1) may(might) have + done sth, can (could) have + done sth 表示过去,推测过去时间里可能发生的事情。
Philip can (could) have been hurt seriously in the car accident.
2) must have +done sth,对过去时间里可能发生的事情的推测,语气较强,具有"肯定","谅必"的意思。< /p>
---Linda has gone to work, but her bicycle is still here.
---She must have gone by bus.
本应该做某事,而事实上并没有做。否定句表示"不该做某事而做了"。
You ought to (should) have been more careful in this experiment3.
He ought not to have thrown the old clothes away.(事实上已扔了。)
ought to 在语气上比should 要强。
4) needn‘t have done sth 本没必要做某事
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1
accident
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n.事故,意外的事 | |
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2
ought
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v.aux.应该,大概;n.责任 | |
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3
experiment
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n.实验,试验,尝试;v.实验,尝试 | |
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4
was
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v.(is,am的过去式)是,在 | |
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5
would
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aux.will的过去式;愿,要;常常;大概;将要,会 | |
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6
article
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n.文章,物品,条款;冠词 | |
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