核心考点八 情态动词与虚拟语气
——使表达得体、含蓄
1．He ________ fatter but he eats too little.
A．would become B．would have become
C．must become D．must have become
解析 根据语意知道我们可以在but he eats too little前加上一个省去的条件状语从句if he ate much，由此可知是与现在时相反所以主句用would become。
答案 A
2．He ________ if he works hard for the people.
A．shall praise B．shall be praised
C．will praise D．will be praised
解析 句意：如果他为人民努力工作，他会受到表扬。说话人希望他受到表扬，而will表示的是句子的主语的意愿，那样意思就是“他愿意受到表扬”，显然不对。shall用于第三人称可表示说话人对某人所持有的主观立场和坚定的信念。
答案 B
3．There was a lot of fun at yesterday's party.You ________ come，but why didn't you?
A．must have B．should
C．need have D．ought to have
解析 该空含你本来应来但实际未来之意，应填ought to have。
答案 D
4．I was really anxious about you.You ________ home without a word.
A．mustn't leave B．shouldn't have left
C．couldn't have left D．needn't leave
