fall的过去式是fell。fall作名词时意思是“秋季；垮台、衰败”，作动词时意思是“落下；跌倒；下垂；跪下；（地面）向下倾斜；（数量等）减少；（雨或雪）降落；沦陷；阵亡；进入（某状态）；突然来到”，作形容词时意思是“秋天的”。
fall的过去式例句：
1、He fell downstairs and broke his wrist.
他摔下楼梯，摔断了手腕。
2、Wilde fell and struck his head on the stone floor.
怀尔德摔倒了，头撞在石头地上。
3、The earth shook and the walls of neighbouring houses fell around them.
地面摇晃，周围房屋的墙体在他们身边倒塌。
fall的用法例句：
1.Sometimes things have to fall apart to make way for better things.
有时候要到达谷底，才会慢慢变好。
2.Here's an inside tip: The faster you rise, the harder you fall.
给你一个小忠告：爬得越快，摔得越疼。
3.Over a given period, the value of shares will rise and fall.
股票的价值在某一特定的时期内会有涨跌。