ought to have done 1、“ought to have + 动词的完成式”表示过去应做某事而实际未做,它的否定形式表示本不应该做某事却做了(用法和should相同)。 You ought to have helped him, but ...
表示到将来某个时间为止势必会完成或预计要完成的动作,由“will [shall]+have+过去分词”构成: He will have arrived by now. 他现在应当已经到了。 He will have gone back to England.他想必回英国去了。 When we get there,she’ll have gone to work. 我们到那里...
成人高考学位英语备考练习:非谓语动词 一、不定式 (一)基本结构 to do to be doing to have done to be done to have been done 学位英语真题汇编 1、Judging from his manners at the party, he does
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