leave过去式是left
leave
英 [liːv]
美 [liːv]
v.
离开（某人或某处）;遗弃;丢弃;不立刻做;使保留，让…处于;使发生;留下备用（或销售等）;忘了带;剩余;遗下（家人）;（去世时）遗赠，遗留;把…留交;递送
n.
休假;假期;准许
例句
It‘s not for me to say why he left.
不适宜由我说出他离开的原因。
One day, I want to leave the city and move to the country.
有朝一日，我要离开城市搬到农村去。
He went down the pit when he left school.
他中学一毕业就当矿工了。
