【正文】
Grammar 情態(tài)動(dòng)詞 ?非推測(cè)性情態(tài)動(dòng)詞 shall, will, must, mustn’t, should, would的用法 ?情態(tài)動(dòng)詞 could, should/ought to, may/might , needn’t+ have done 表示假設(shè)的用法 ?情態(tài)動(dòng)詞 must, can/could, may/might, should/ought to表猜測(cè)的用法 ?情態(tài)動(dòng)詞的一些慣用法 表示推測(cè) —— 情態(tài)動(dòng)詞的重要用法 . 肯定的推測(cè) 可能的推測(cè) 否定的推測(cè) 疑問(wèn)的推測(cè) must 對(duì)將來(lái) 對(duì)現(xiàn)在 對(duì)過(guò)去 情態(tài)動(dòng)詞 may, might can’t, couldn’t can, could + V. + V. + have done 常見(jiàn) must be + be doing + V. + V. + have done + be doing 可以用 not表示“可能不” +V. + V. + have done + be doing + V. + V. + have done + be doing ?Must +have done 表示對(duì)過(guò)去已經(jīng)發(fā)生的行為進(jìn)行推測(cè),意為“想必 /準(zhǔn)是 /一定作了某事”。 must have learned 2,000 words by the end of last term. 到上學(xué)期為止我們一定學(xué)了有兩千個(gè)單詞 。 must have gone to Beijing. 他一定已經(jīng)去北京了。 ?can/could+have done表示對(duì)過(guò)去的行為的懷疑和不肯定,通常用在否定句和疑問(wèn)句中。 1. Can they have won the basketball match? 他們可能贏了籃球賽嗎? 2. It couldn’t have been Mr. Green. He has gone to New York. 那不可能是格林先生的,他已