不是.这里的USE 是动词整个词组的意思是过去常常强调过去的动作及 经常性与其区分的是 be used to do sth.被用来做某事还有 be used to doing sth.习惯于做某事希望能给你帮助.
在used to do句型里use是助动词吗、
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