2013年职称英语考试语法指导：情态动词4 2 X2 l' Z7 j: h ~情态动词+行为动词完成进行式 中华考试网(www．Examw。com)& _! w, k# x/ L! n3 T: h" u
情态动词+行为动词完成进行式（即情态动词+ have been + v-ing 形式），表示推测或评论过去某动作是否正在进行或一直在进行。例如： ' _, v5 k+ E$ n4 Q' @
1）They should have been meeting to discuss the problem. ! A9 U/ E' h0 M% J
2）He may / might have been buying stamps in the post office when you saw him.
发表于 2012-8-15 23:36:10
