. --- I'm sorry. I ____________ the bike to you yesterday. But I was too busy at that time.
--- Never mind.
A.should returnB.should have returnedC.must returnD.may have returned
B

試題分析:考查情態(tài)動詞的用法,因?yàn)檎f的是昨天的事,用情態(tài)動詞+have done,它們指的都是過去的情況,should have done本應(yīng)該做而沒做,may have done本可以做,句意是:對不起,我本應(yīng)該昨天把自行車還給你的,但我太忙了。選B。
點(diǎn)評:情態(tài)動詞+have done可以表示推測和虛擬:“must+have+done”表示對過去事情的肯定推測,譯成“一定做過某事”,該結(jié)構(gòu)只用于肯定句!癱an't+have+done”表示對過去事情的否定推測,譯成“不可能做過某事”!癿ay+have+done”表示對發(fā)生過的事情的推測,意思是“可能已經(jīng)”或“也許已經(jīng)”,用于肯定句中!癱ould+have+done”是虛擬語氣,表示對過去事情的假設(shè),意思是本來能夠做某事而沒有做。 “would+have+done”虛擬語氣,表示對過去事情的假設(shè),意思是“本來會做”。
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