这一题目有点疑问请帮看下从属时态问题原句子Do you know who he is?可否更改a.Do you know who he was?b.Did you know who he is?c.Did you know who he was?以上合乎逻辑否有错误请帮指正出

问题描述:

这一题目有点疑问请帮看下从属时态问题
原句子
Do you know who he is?
可否更改
a.Do you know who he was?
b.Did you know who he is?
c.Did you know who he was?
以上合乎逻辑否有错误请帮指正出

a 有可能,比如有人做过整容手术什么的,
b 可以, 你之前就知道他是谁了?
c好像不行,如果按a所说,应该是Did you know who he had been?

c.Did you know who he was?
问你当时是不是知道他是谁.回答:
1.I knew who he was.
2.I didn't know who he was.