不定式中含有to have been通常保留have been,请举几个例句

lucy1006 1年前 已收到1个回答 举报

雨梦1230 花朵

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如果不定式中含有be, have, have been,通常保留be, have和have been.如:
—Are you a sailor?
__No, but I used to be.
__He hasn’t finished his homework yet.
__Well, he ought to have.

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1年前

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