We______ have proved great advanturers,but we have done the

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We______ have proved great advanturers,but we have done the greatest march ever made in the past ten years.
A.needn't B.may not C.shouldn't D.mustn't
关于几个常用情态动词的否定式加上完成时的用法,请具体解释.如有例句最好.

We______ have proved【to be】 great 【advanturers—adventurers】,but we have done the greatest march ever made in the past ten years.
A.needn't B.may not C.shouldn't D.mustn't
是选B.
句子实际可变为：
We may not have proved (to be+n/adj.可省略) great adventurers,but we have done the greatest march ever made in the past ten years.
句意：我们也许不是最伟大的探险家,但是过去十年中我们确实走过了最了不起的历程.
needn't have done 过去本来不必做（却做了）
may not have done 过去也许/可能不
shouldn't have done过去本来不应该做（却做了）
mustn't 禁止/不许做.表示肯定性推测判断时,要用于肯定句.否定句中常用can、could代替表示推测判断.
按照语义,只有B 最合适.

We______ have proved great advanturers,but we have done the 翻译：We may not have proved great adventurers, but we have don We ___ have proved great adventurers, 英译汉we may have proved great adventurers, we have done our we have done ___ we have made__ great progress in the medical field ,but __pr We can't help you,because we______(have)classes. Have we lost our minds?What have we done?But it all doesn’t we have great passion! We have great ()() girls! 连词成句 in have we can hold that water the cardboard proved