could have done "本来可以……"(表示过去没有实现的可能)。 might have done "本来可能……;本来应该或可以做某事"(实际没有发生;含有轻微的责备语气。 should/ought to have done "本来该做某事"(而实际未做) should not/ought not to have done "本来不该做"(实际...
ought to have done shouldn't have done ought not to have done needn't have done could have done (二)三级试题汇编 1、I'm feeling sick. I ___ so much chocolate. A. needn't have eaten B. couldn't have eaten C. mustn't have eaten D. shouldn't have eate...
might have done 除了能够表推测,还能表示过去本来可以做而实际并没有做。这时带有轻微的责备之意。例如: The proposal might have been refused. 这个建议本该拒绝的。(有轻微的责备之...
【起止标识】标记非谓语动词短语时,一定是从动词不定式(to do)、动名词(doing)或分词(现在分词doing或过去分词done)开头,到以下四种情况终止。 ① 到句尾终止,如:Li Hui is a teacher (teaching English). ② 到句中的逗号终止,如:(To improve my English), I often l...
—— Could I have the television on? —— Yes, you can. / No, you can’t. 2)在否定,疑问句中表示推测或怀疑。 He couldn’t be a bad man. 他不大可能是坏人。 比较may和might 1) 表示允许或请求;表示没有把握的推测;may 放在句首,表示祝愿。
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