C.should / would have thought意为本以为,本认为。例如:
A: Can you type?
B: Certainly.
A: Well, I should have thought you wouldnt.
I should have thought she wouldnt agree.
我本来认为她不会同意的。
D.should have thought有时意为认为,以为,相当于should think,但表示更为委婉、谦逊或不肯定的语气。例如:
I should have thought it fairly good.
我以为它是很不错的。
E.should have+ 过去分词用于虚拟语气:
Had you written him, you should have known the details.
6.ought to+动词完成式
此结构表示某种过去应该做而没有做的事,或被忽略未做的某种明智行为。例如:
You ought to have returned the book earlier.(还晚了)
You ought to have refused her at the beginning, but now it is too late.
Note:
这里的ought to也可以用should代替。
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