Question

-Tom has not come to work since last friday._he have had an accident?

A.Might B.Could
选哪个 为什么？

Answer 1

A
“could+have+done”

是虚拟语气，表示对过去事情的假设，意思是本来能够做某事而没有做。

He could have passed the exam, but he was too careless. 本来他能够通过考试，但是他太粗心。

“might+have+done”

表示对过去事情的推测，might与may意思相同，但可能性更小。多用于虚拟语气结构中。

1. He might have given you more help, even though he was busy. 他或许会多给你一些帮助，即使他很忙。

2. She might have achieved greater progress, if you had given her more chances. 如果你多给她点机会，她可能已经取得更大的成绩。

Answer 2

B
猜的

Answer 3

b

Answer 4

选A

Answer 5

A might have done 虚拟语气 表示过去可能发生了什么事