表示推测情态动词
一. 表推测情态动词有：   必定推测普通用must，should/ought    to, may/might或could(不用can)    1.must语气最强，译为“必定， 准     是，想必是”；(mustn’t 表示禁止）   2.should/ought to 语气次之，译为     “很可能, 应该”,指按常理推测；   3.may/might,could语气最弱，译为      “可能，可能”。   4.can’t /couldn’t 表示否定推测, ‘‘不可      能‘‘
You have been working hard all    day ,you must be tired.   He must be working in the office now.   He should come here today.   Can this be done by him?   She may be still waiting for us.   This may not be done by him.   This can not be  ...