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.Did you see him Have you seen him 这两句意思有什么区别?

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.Did you see him Have you seen him 这两句意思有什么区别?
翻译:你(刚刚)看到他了吗?
为什么是Have you seen him
.Did you see him Have you seen him 这两句意思有什么区别?
Did you see him 是过去时,问的是在过去某特定时间你是否看见了他.
Have you seen him 是现在完成时,问的是到现在为止的这段时间你是否见到了他.
举个吃饭的例子.
Did you eat breakfast?你今天吃了早饭吗?问的是已经发生的事.可能你现在看起来很憔悴,很饿,我才有此一问.
Have you eaten breakfast?吃了早饭吗?要是吃了,我们就开始工作了.很可能只是例行公事的寒暄.