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句型宝典之含助动词句4

发布时间:2016-03-17  编辑:查字典英语网小编

may have V-ed

结构︰主词+may/might have+过去分词

说明︰此句型意为很可能曾经。表示对过去之事做不太肯定的推测。而may/might+原形动词是对现在或未来事物做推测。might have 所表示的可能性要比 may have 低一些。

He may have overslept this morning. 今天早上他或许睡过头了。

The tea is hot; he may have been here before. 茶还热着,不久前他很可能在这里。

He may have known the truth; otherwise he wouldnt be so angry now.

他当时很可能知道事情的真相,否则他不会这么生气。

The boy might have known the truth, but I am not quite sure.

这男孩当时也许知道真相,但我不很确定。

cannot have V-ed

结构︰主词+cannot have+过去分词

说明︰此句型意为不可能曾经。是对过去之事做否定的推论,此时一定要用 cannot have 或 cannot,不能使用 must not have 或 must not.而cannot+原形动词是对目前或将来之事做否定的推论。

She cannot have written the letter herself. 这封信不可能是她自己写的。

He is honest, so he cannot have stolen my money.他是个老实人,所以他不可能偷了我的钱。

He cannot have caught a cold, because I saw him dancing with Mary the same day.

他不可能感冒,因为当天我还看到他跟玛丽跳舞。

would have V-ed

结构︰主词+would have+过去分词

说明︰此句型意为原本会但却未如此。用以表示与过去事实相反的假设语气.

He would have attended meeting, but upon learning that he had no time, he dropped the idea.

他原本要出席会议的,但知道没有时间,就打消了这个念头。

I would have told you the truth, but you didnt give me a chance.

我本来要告诉你事情的真相,但是你不给我机会。

I would have done it, but I had no time. 我本来要办这事的,可是没时间。

She would have married him, but when she learned that he was a rascal, she parted with him.

她本来会嫁给他的,但知道他是个流氓后,她就离开他了。

could have V-ed

结构︰主词+could have+过去分词

说明︰此句型意为原本能够但却未如此。

He could have bought the car, but soon his company went bankrupt.

他本来能买那辆车的,但没多久他的公司就倒闭了。

He could have finished it on schedule, but somehow he fell behind.

他原本能按预定进度做完这件事的,但不知怎地却落后了。

I could have done it if I had wanted to. 如果我那时想做,我能做得到的。

should have V-ed

结构︰主词+should/ought to have+过去分词

说明︰此句型意为原本应当但却未如此。此句型表示没有实现之过去的行为、状态,含有讲话者的责难或遗憾之意。

You should have spoken up in the meeting. 会谈时你实在应该发言(然而你却没有)。

He should at least have come to say good-by. 他至少也该来道个别(然而却没来)。

He ought to have kept his promise. 他原本应该遵守自己的诺言。

You should have been more careful in money matters. 在钱方面,你本当更小心点的。

He ought to have arrived there by now. 他现在应该已经到那里了。

The drama drew a capacity audience; you should have gone to see it.

这出戏吸引了满场观众;你真该去看的。

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