精选优质文档-倾情为你奉上2015专四语法考点:情态动词*情态动词: will(愿意), shall(将), must(必须), can, may, would, should (应该), might, could, ought to, used to(过去常常), need(需要), dare(竟敢),have to(不得不)考试中,情态动词部分重点测试以下内容:(1)情态动词+行为动词完成式(表示推测)(2)某些情态动词的特殊用法考点1.情态动词have过去分词结构表示推测(1) must have v-ed表示推测过去某事“一定”发生了。否定形式为:cant / couldnt have v-ed,表示过去不可能发生某事。1. Nancys gone to work but her cars still there. She _must have gone _ by bus.2010 A. must have gone B. should have gone C. ought to have gone D