问题: must be与must have been?
36. John _____ a restless person. He kept moving from country to country.
A. must be B. should be C. must have been D. should have been
答案给的A,后半句是过去时,为什么不选C?过去的推测?
解答:
答案应该选C. must have been 是对过去情况的猜测或判断.既然,后文用的是过去时态,就说明是过去的一种情况.因此,推理为"他(以前/过去)一定是一个闲不住的人".而答案A只能是说明现在,或对现在的猜测,所以,我个人认为A答案是不正确的.
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