have和has怎么变一般疑问句

当谓语 “有” “吃”的意思，用 Do , Does 变一般疑问句
I have eggs and bacon for breakfast.
Do you have eggs and bacon for breakfast?
但如果角色就是助动词，如完成时，就把 have, has, 变成疑问词，置于句首
I have been to Shanghai before.
Have you been to Shanghai before?

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