2. 外语
  3. He fell asleep immediately last night. He ______ very tired.

He fell asleep immediately last night. He ______ very tired.

admin2009-05-28  29
问题 He fell asleep immediately last night. He ______ very tired.
选项 A、must be
B、must have been
C、can be
D、could have been
答案B
解析 情态动词。此句是根据结果推测原因，推测做过的事情的原因用虚拟语气的形式来表示，即：must have done表示对过去事情的肯定性推测，注意其否定形式不是在must后面加not，而是用can或could来否定，称之为否定推测。[例句] This bottle is nearly empty，you must have drunk a lot．瓶子快空了，你一定喝了不少。
转载请注明原文地址:https://kaotiyun.com/show/HkvK777K
本试题收录于： 大学英语三级A级题库大学英语三级分类
0

大学英语三级A级

大学英语三级

相关试题推荐
随机试题
最新回复(0)