情態動詞
a. shouldn’t b. mustn’t c. can’t d. wouldn’t ②— isn’t that ann’s husband over there? — no, it _______ be him i’m sure he doesn’t wear glasses. （XX年全國卷ⅰ） a. can’t b. must not c. won’t d. may not 3. 疑問句中的推測，往往用can或could。 mr. bush is on time for everything. how ______ it be that he was late for the opening ceremony？（XX年上海春季卷） a. can b. should c. may d. must 4. 對已發生事情的肯定推測常用“must, may, might等+完成式”；否定推測常用“can, could, may, might等+完成式”。 ①i was on the highway when this car went past followed by a police car. they _______ at least 150 kilometers an hour.（XX年重慶卷） a. should have been doing b. must have been doing c. could have done d. would have done ②he _______ have completed his work; otherwise, he wouldn’t be enjoying himself by seaside. （XX年北京卷） a. should b. must c. wouldn’t d. can’t ③—tom is never late for work. why is be absent today? —something ________ to him. （XX年江西卷） a. must happen b. should have happened c. could have happened d. must have happened ④ my sister met him at the grand theatre yesterday afternoon, so he_____ have attended your lecture.（XX年上海卷） a. couldn’t b. needn’t c. mustn’t d. shouldn’t