考研英语备考很多事情都要提上日程了,看看哪些是该注意的,下面由留学群小编为你精心准备了“2021年考研英语:情态动词的语法指示”,持续关注本站将可以持续获取更多的考试资讯!
2021年考研英语:情态动词的语法指示
一、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 must have been apparent the moment I walked into the room, for the first man I met asked sympathetically: “Are you feeling all right?”
(2)cant/couldn’t have +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 couldn’t have received my letter; otherwise she would have replied before now.
(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’s Crystal River plant, a potentially serious leakage of radioactive water may have been unknowingly caused by an electrician.
二、表示虚拟语气
(1)needn’t have+过去分词,表示做了不必做的事,译为“其实没必要……”。如:
As it turned out to be a small house party, we needn’t have dressed up so formally.
(2)should /should not have +过去分词,表示应该做某事但实际上未做,或本不应该做但实际上做了, 译为“本(不)应该……”。如:
I regret having left the work unfinished; I should have planned everything ahead carefully.
(3)ought to have+过去分词,表示动作按理该发生了,但实际上未发生,译为“该……”,与should的完成式含义类似。如:
The porter ought to have called the fire-brigade as soon as he saw the fire in the stock, which went up in smoke.
(4)could have+过去分词,表示过去本来可以做但却未做,译为“完全可以……”。如:
What you said is right, but you could have phrased it more tactfully.
...