USED TO DO STH.能不能配WHEN

USED TO DO STH.能不能配WHEN used to do sth. used to do sth used to do sth.造句 配中英文 used to do sth. 意思 used to do sth,be used to sth ,be used to do sth use的用法.used to do sthbe used to do sth be used to doing sth 区别(used to do sth 和be used to used sb to do sth 怎么回答 用be used to do sth.造句 used to do sth 的否定式 翻译成英文：used to do sth