问题描述：
I've already had lunch.Have you had lunch yet?这是什么时态呢?
I've already had lunch.
Have you had lunch yet?
这是新概念二第4课的课后练习,这是什么时态呢?是现在完成时吗?
I've already had lunch.
Have you had lunch yet?
这是新概念二第4课的课后练习,这是什么时态呢?是现在完成时吗?
问题解答：
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