leave在表示“离开”时,强调的是“从原来的地方离开”，既可作不及物动词，也可作及物动词。用作不及物动词时，常与介词for连用，表示出发去(某地)，只表示方向，而不涉及到达与否。那么leave的过去式和过去分词是什么呢？
过去式和过去分词
第三人称单数：leaves
现在分词：leaving
过去式：left
过去分词：left
常见例句
It's a long time since they left.
他们已经离开很久了。
When I left they were all still hard at it.
我离开的时候他们都还在努力工作。
It's not for me to say why he left.
不适宜由我说出他离开的原因。
He's been working in a bank since leaving school.
他中学毕业以后一直在一家银行工作。
Very young children should not be left to play without supervision.
不能让幼儿在没人照看的情况下独自玩耍。
You couldn't have left it on the bus, could you?
你不可能把它落在公共汽车上了吧？
He's lost two lives, so he's only got one left.
他失去了两次机会，所以只剩下一次了。
She left her children behind with a heavy heart.
她十分难过地丢下了她的孩子们。
When she left school she grew away from her mother.
她中学毕业后就不再那么依赖母亲了。
