基本信息
情态动词和虚拟语气专题演练一 1．they ________ have arrived at lunchtime but their flight was delayed. a. will b. can c. must d. should [解析]句意：他们本应该午餐时间到达，可是他们的飞机晚点了。can 用在疑问句和否定句中，意为：可能；must have done 表示推测，意为：一定做过；should have done 表示(过去)本应该做而没做。根据句意可知答案为d项。 [答案]d 2．if you ________ smoke, please go outside. a. can b. should c. must d. may [解析]句意：如果你非要抽烟，请到外面去。must 用于条件句，表示“非要，偏要”。其他三项均不符合语境。 [答案]c 3．i ________ sooner but i didn't know that they were waiting for me. a. had come b. was coming c. would come d. would have come [解析]句意：我不知道他们一直在等我，否则，我就会早点来了。根据 but 后面内容可知设空处表示与过去事实相反的虚拟语气，其主句谓语动词形式：would/should/could/might have done。故答案为d项。 [答案]d
