精选优质文档-倾情为你奉上 高考情态动词重点讲解一、情态动词的特征和形式A. 情态动词表推测1. 形式肯定的推测:must否定的推测:cant couldnt可能的推测:may might can could疑问的推测:can could2. 时间对过去:情态动词+完成式(have donehave been done)对正在进行:情态动词+be doing对现在或将来:情态动词+do不同的“肯定”程度可按下列层次排列: He is at home. (事实) He must be at home.(非常肯定的推断) He could be at home.(很可能) He ought to be at home.(很可能) He may be at home.(仅仅可能而已) He might be at home.(或许, 非常不确定) He might not be at home.(也许不在家)He may not be at home. (比might