⒋ must +have +过去分词的结构,常用在肯定句中,表示对过去发生行为的推测,含有“一定”、“准是”的意思。否定和疑问句用can。 如:She must have studied English before.她以前一定学...
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...
clear意为“明白的, 清楚的”. 指不模糊含混, 易于观察, 了解和识别 3.What could have happened? Something terrible must have happenedif Li Chang ? ◇ couldhave done 会发生什么呢? musthave done 准/定是发生了?, 这两句是由情态动词+完成时结构,构成的虚拟语...
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
We must take steps to solve the problem. Steps must be taken to solve the problem. Something must be done to solve the problem. 5.要有主题句 The museum's promotion of cultural and creative products makes sense in the following aspects...
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