used to的一般疑问句?

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used to的一般疑问句?
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used to的一般疑问句?
used to的一般疑问句?

used to的一般疑问句?
疑问句:used sb. to do sth.?
Did sb. use to do sth.?
e.g. Used you to live there when you was a child.
Did you use to live there when you was a child?

did

例:You used to smoke a pipe,didn't you?

used sb. to do sth.?
Did sb. use to do sth.?
皆可,但常用第二种

used sb. to do sth.? 做情态动词用法
Did sb. use to do sth.? 做实意动词用法
都可以的