You should learn from each other.
2.ought to表示根据某种义务或必要“应当”做某事。如:
Everyone ought to obey the traffic regulations.
3.should和ought to也可用来表示推测,意为“想必会……”。如:
— When can I come for the photos?I need them tomorrow afternoon.
— They should be ready by 12:00.
【典例分析】What do you mean,there are only ten tickets?There ______ be twelve.
A.should
B.would
C.will
D.shall
答案为A项。由前句“你说什么,只有10张票?”可见说话者感到吃惊,由此判断下句说话的意思是“应该”有12张票。should表示“应该”,符合句意。
考点七:情态动词表示推测
1.肯定句中用must(一定,很可能),may(可能),might/could(也许,或许)表示推测。表示对当前行为、情况或状态的推测,用must/may/might/could+do/be句型;表示对此时此刻正在进行的动作的推测,用must/may/might/could+be doing句型;表示对过去发生的事情的推测,用must/may/might/could+have done/been句型。如:
I always meet him in the street.He must/may/might/could live quite near here.
There is still light in his room.He must/may/might/could be studying at this time.
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