(延边F) [对症下药]
C
6. (延边F) ( 典型例题精选 ) I was on the high way when this car went past followed by a police car. They
at least 150 km an
hour.
A. should have been doing
B. must have been doing
C. could have done
D. would have done
(延边F) [考场错解]
C
(延边F) [专家把脉]
本题是对过去发生事情的一种猜测,同时还强调警察追赶他时正在发生的情况,所以选B。
(延边F) [对症下药]
B
(延边F)专家会诊
小结:“情态动词+have+过去分词”用法
1.(延边F)must have done表示对过去已经发生的行为进行推测,意思是“想必、准是、一定做了某事”。如:
It must have mined last night, for the ground was quite muddy.
The lights were out. They must have been asleep.
2.(延边F)may/might have done表示对过去已经发生行为的推测,意思是“也许、或许、已经(没有)……”。一般只用于肯定句或否定句中,不用于疑问句。用lnight则表示语气更加不肯定。如:It ' s too late. I think he may have gone to bed. He may not have finished the work. She might have caught a cold.
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