Question

But for your error, it _______ easier for you to pass the driving test. After all, you had high－quality training.

A. must have been    B. should be

C. might have been    D. could be

Answer

C

【解析】考查情态动词的用法。A. must have been一定做过某事，对过去事情的肯定推测；B. should be应该是；C. might have been或许做过，对过去事情的推测；D. could be可能是。句意：要不是你的错误，你可能更容易通过驾驶考试。毕竟你有高质量的培训。此处用虚拟语气，表示对过去事情的不肯定推测。故选C。不能选B项，B项表示很肯定的推测，“应该是”，但根据常识，有高质量的培训不代表一定过，故不能选B。

【名师点睛】

情态动词+have done用法总结：

一、“must +have +done”表示对过去事情的肯定推测，译成“一定做过某事”，该结构只用于肯定句。

1. It must have rained last night, for the ground is wet. 昨晚一定下雨了，因为地面还是湿的。

2. You must have been mad to speak to the servant. 你和仆人说话，一定是发疯了。

二、“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。

三、“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。

四、“should +have +done”意思是“本来应该做某事，而实际没做。” “shouldn't +have +done”表示本来不应该做某事，而实际做了。含有指责对方或自责的含意。

1. Tom, you are too lazy. The work should have been finished yesterday. 汤姆，你太懒惰了，这项工作本来应该昨天就做完的。

2. Look, Tom is crying. I shouldn't have been so harsh on him. 看，汤姆哭了，我本来不应该对他如此严厉。