短语词组短语used d to be 过去是and used to be 改变了一切used to be common 过去很普遍used to be sb 过去什么职业Used to be quiet 过去常常安静Customer Used To Be 为会Used to be ignored 习惯被忽略used to be alone 曾经孤单;总是孤身一人that used to be 原来是;曾经是 返回 used to be