have you ever complained about these things?为什么疑问句开头要用have啊

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have you ever complained about these things?为什么疑问句开头要用have啊
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have you ever complained about these things?为什么疑问句开头要用have啊
have you ever complained about these things?为什么疑问句开头要用have啊

have you ever complained about these things?为什么疑问句开头要用have啊
have you ever complained about these things?这是一个现在完成时的句子,have是助动词,相当于我们学过的does do
“你曾经抱怨过这些事吗?”

这个have作“曾经”的意思。