15过去将来完成时(would have done) 表示就过去某一时间而言,将来某一时间之前所完成的动作。常用在虚拟语气中,表示与过去事实相反。 例:I believed by the end of that year an advanced version of that software would have been developed, but I was wrong. 我坚...
1.should have done =ought to have done 本应该做而没做 2.would have done = 本来就会去做某事而没做 3.could have done = 本可以做某事而没做 4.might have done 本可以做而没做 例:They ought to have apologized. 他们本该道歉的。 5. must have done sth 一定做...
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