美 [wʊd hæv]
虚拟语气：表示过去某种情况或行动本应该发生，但实际上并没有发生。通常与'could have'或'should have'连用，表示本应该做某事，但最终没有做。
I would have liked a life in politics.
我本想从事政治。
I think I would have died of embarrassment.
我觉得我一定会尴尬得要死。
Any old room would have done.
随便哪间屋子都行。
Lenders would have to keep five percent of the home loans they would normally group together to sell as securities.
VOA : special.2009.06.19
He would gladly have traded dozens -he would have traded dozens of corrupt Anglican ministers for the simple and honest King.
他可以欣然的,他可以出卖大量的圣公会牧师的头衔，并从中牟利,只是为了一个诚实简单的国王。
弥尔顿课程节选 : 耶鲁公开课
This was even longer than that. But also I would have to write this thing for one of the classes,
去年那段时间比高中的学习时间还长。而且我们还要写一些东西，
SpeakingMax英语口语达人 : 耶鲁的忙碌生活
If they had, they would have been tested to see if they needed treatment to prevent an infection like H.I.V.or hepatitis.
VOA : special.2010.02.10
Scientists think the largest dinosaurs would have to have spent thirty hours a day chewing and swallowing their food.
VOA : special.2010.06.04
The idea was that the person who found it would have a fabulous prize.
He said the reopening of the line would have a huge impact on the area's "psychologically".
Most models of inflation suggest the expansion would have been accompanied by ripples of gravitational energy.