21.6 表示推測的用法 | ||
? | can, could, may, might, must 皆可表示推測,其用法如下: 1)情態(tài)動(dòng)詞+動(dòng)詞原形。 表示對現(xiàn)在或?qū)淼那闆r的推測,此時(shí)動(dòng)詞通常為系動(dòng)詞。 I don't know where she is, she may be in Wuhan. 2)情態(tài)動(dòng)詞+動(dòng)詞現(xiàn)在進(jìn)行時(shí)。 表示對現(xiàn)在或?qū)碚谶M(jìn)行的情況進(jìn)行推測。 At this moment, our teacher must be correcting our exam papers. 這時(shí),我們老師想必在批改試卷。 3)情態(tài)動(dòng)詞+動(dòng)詞完成時(shí)。 表示對過去情況的推測。 We would have finished this work by the end of next December. 明年十二月底前我們很可能已完成這項(xiàng)工作了。 The road is wet. It must have rained last night. 地是濕的,昨天晚上一定下雨了。 4)情態(tài)動(dòng)詞+動(dòng)詞的現(xiàn)在完成進(jìn)行時(shí)。 表示對過去正在發(fā)生事情的推測。 Your mother must have been looking for you. 你媽媽一定一直在找你。 5)推測的否定形式,疑問形式用can't, couldn't表示。 Mike can't have found his car, for he came to work by bus this morning. 邁克一定還沒有找回他的車,因?yàn)樵缟纤亲财噥砩习嗟摹? 注意:could, might表示推測時(shí)不表示時(shí)態(tài),其推測的程度不如can, may。 |