:
He would sit for hours doing nothing.
过去他常常一坐几个钟头什么事也不做。
c)表示过去连续发生的一系列动作。
She entered the room, picked up a magazine and looked through it carefully.
她走进房间，拿起一本杂志，认真地翻阅了起来。
The students go up early in the morning, did morning exercises and then read English aloud in the open air.
学生们很早起床，做早操，然后在室外朗读英语。
d)在时间、条件状语从句中表示过去将要发生的动作。
We would not leave until the teacher came back.
老师回来我们才会离开。
She told me she would not go if it rained the next day.
她告诉我如果第二天下雨的话，她就不去了。
