2024成人高考《英语》重点复习资料(6)
2024年成人高考(英语)复习资料(6) 情态动词
(一)情态动词的现在完成式的用法
情态动词现在完成式主要有两个功能:表示已经发生的情况和表示虚拟语气。在这两个方面must/mustn\,;can/cann\mightn\
ougtht等情态动词+完成式表示的意思是有一定区别的 1.表示已经发生的情况。
1)must have+过去分词,表示对已发生情况的肯定推测,译为“(昨天)一定……”。如:
My pain apparent the moment I walked into the room, for the first man I met asked sympathetically:“ Are you feeling all right?”
[A] must be [B] had been [C] must have been [D] had to be (答案为C)
2)can\过去分词,表示对已发生情况的否定推测,译为“(昨天)一定没……”。如:
Mary my letter; otherwise she would have replied before now. [A] couldn\[C] has received [D] shouldn\
(答案为A)
3)may / might have +过去分词,表示对已发生的事情做不肯定、可能性很小的推测,或事实上根本没发生,译为“也许……”。如:
At Florida Power\Crystal River plant, a potentially serious leakage of radioactive water may have been unknowingly caused by an electrician. 2.表示虚拟语气。