1.didn't have to 是表示 “过去这件事情没有必要做”,但是实际上可能做了,也可能没做.如：I didn’t need to book a ticket in advance.(= I didn’t book) I didn’t need to take a taxi from the airport – the...
辨析did not need to do与needn't have done
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相关问题
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区别shouldn't have done 和 needn't have done
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didnot need to do与 neednot have done 的区别
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did not need to need not have 的区别吗
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needn't 与don't need to的区别?
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needn't do可以用在过去的时态中吗?要不要改成needn't have done
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should have done;must have done;need have done;could have do