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?

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• 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?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?
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• 帮忙把这个句子翻译成英文.（你的爸爸是干什么的?）