In short,"LE" is over in chinese.Here is a poetry can help you understand "LE". 了了 风吹遍 云散了 影子 淡了 花开得 累了 春天 倦了 两个人 厌了 心里 怨了 路的尽头 不见了 步子 乱了 是散了 是淡了 是倦了 是乱了 是草儿 绿过 就算了 是季节 变了 谁厌了 谁怨了 谁不见了 谁又乱了 谁许的诺言 不算了 谁和谁的爱情 变了 走着走着 散了 回忆都 淡了 看着看着 就累了 星光也暗了 听着听着 就醒了 开始 埋怨了 回头发现你 不见了 突然我 乱了 海枯石烂了 地球不转了 主角都换了 情话听惯了

LE can mean 了 - or in English context it stands often for "Law Enforcement" = Police.

The most commen usage is to use it to express some action that you have ALREADY done. example: eat = 吃 already eaten = 吃了 cook = 煮 already cooked = 煮了

Sophie comes closest. The keyword for LE is "completion" or "over". It can express completion in the past, present, or future. This may help you understand it when you come across it again.

It always use behind the v. .Such as ,eat le;wash le etc. I hope it will help you.