1.do while 译为:做时 用法:循环语句 例句:So what did you do while you walked her to the bus? 你和她一起走去公车站时,有没有做过什么?
2.while译为:虽然 用法:消磨,打发(时间);(愉快而懒散地)度过(时间)(常与 away 连用) 例句:They were grinning and watching while one man laughed and poured beer over thehead of another 当一个男人大笑着把啤酒倒在另一个人头上时,他们都在乐呵呵地看着。