used to do sth.的中文意思是什么?

used to do sth.的中文意思是什么? be used to doing sth.的中文意思是什么? used to do sth. 意思 mean to do sth 的中文意思? use to do sth.的中文意思 sb used to do sth.它的否定形式是什么? used to do sth. used to do sth use的用法.used to do sthbe used to do sth be used to doing sth used to do sth中used 是什么词 used to do sth和be used to doing sth中的used是什么词性? use to do sth和be used doing sth的意思