英語(yǔ)語(yǔ)法對(duì)于學(xué)習(xí)英語(yǔ)也是非常重要的一部分，語(yǔ)法更是英語(yǔ)的交流寫作基礎(chǔ)。所以小編為您編輯了此文：“高考英語(yǔ)語(yǔ)法復(fù)習(xí)講解：情態(tài)動(dòng)詞英語(yǔ)語(yǔ)法講解”，希望能給您帶來(lái)幫助。

上海英語(yǔ)冬令營(yíng)介紹
(一)情態(tài)動(dòng)詞

一.情態(tài)動(dòng)詞的現(xiàn)在完成式的用法

情態(tài)動(dòng)詞現(xiàn)在完成式主要有兩個(gè)功能：表示已經(jīng)發(fā)生的情況和表示虛擬語(yǔ)氣。在這兩個(gè)方面must/mustn’t,;can/cann’t;need/needn’t;may/mayn’t;might/mightn’t;should/shouldn’t;

ougtht等情態(tài)動(dòng)詞+完成式表示的意思是有一定區(qū)別的

1.表示已經(jīng)發(fā)生的情況。

1)must have+過(guò)去分詞，表示對(duì)已發(fā)生情況的肯定推測(cè)，譯為“(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

(答案為c)

2)can’t / couldn’t have+過(guò)去分詞，表示對(duì)已發(fā)生情況的否定推測(cè)，譯為“(昨天)一定沒(méi)……”。如：

mary my letter; otherwise she would have replied before now.

[a] couldn’t have received [b] ought to have received

[c] has received [d] shouldn’t have received

(答案為a)

3)may / might have +過(guò)去分詞，表示對(duì)已發(fā)生的事情做不肯定、可能性很小的推測(cè)，或事實(shí)上根本沒(méi)發(fā)生，譯為“也許……”。如：

at florida power’s crystal river plant, a potentially serious leakage of radioactive water may have been unknowingly caused by an electrician.

2.表示虛擬語(yǔ)氣。

1) needn’t have + 過(guò)去分詞，表示做了不必做的事，相當(dāng)于”didn’t need to do”,譯為“其實(shí)沒(méi)必要……”。如：

you needn’t have come over yourself.

as it turned out to be a small house party, we so formally.