She may have known the news; she is crying. (她可能已经知道那个消息了;她在哭。)
You neednt have bought that dictionary; I have got a spare one. (你实际上没有必要买那本字典;我有一本多余的。)
由于在没有情景的情况下很难区分情态动词一般式和完成式,例如你不该去,究竟是You shouldnt go there. 还是 You shouldnt have gone there, 因此考试的时候往往会给出情景,这对判题非常重要,如上面表格例子中的the ground is wet,the baby was cut badly,she is crying, 都是题目所给的情景。
【2015年职称英语考试常用语法详解之情态动词的完成式】相关文章:
★ 2015职称英语考试常用语法详解第一讲(词类、名词的数与格)
★ 2015职称英语考试常用语法详解第五讲(动词非谓语形式)
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