Have you had your lunch?为什么用have提问,中间的had又是什么意思

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Have you had your lunch?为什么用have提问,中间的had又是什么意思
Have you had your lunch?为什么用have提问,中间的had又是什么意思

Have you had your lunch?为什么用have提问,中间的had又是什么意思
have是表示完成时
had是吃饭的吃（have）这个动作的过去分词形式~

改为陈述语句you have had your lunch时态是过去完成时，疑问句助动词提前用have提问

第一个have 是表完成时，不是动词。
第二个had，是固定用法，have your lunch, 意思是说吃午饭。而had只是完成时的动词变化。

had 是have的过去分词，因为吃午饭是have lunch
这句话用的是现在完成时，陈述句是
I have had my lunch。我吃过午饭了。
如果改成一般疑问句就是
Have you had your lunch? 你吃过午饭了吗？
现在完成时可以表示某件事情已经做完了

全句的意思为“你已经吃过午餐了吗？”
由于是现在完成时态，即have(has)+V(过去分词形式)，因此句首的Have是现在完成的所需要的；
have lunch "吃午餐"，是固定用法，在这里have作为动词用。因此中间的had作为have的过去分词形式出现。

固定短语：have lunch吃午餐
用have是表现在完成时，现在完成时的形式：have+done，意思是说：你吃过午餐了没？

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