lose用作动词，基本意思是“丢失”、“失去”,指因事故、过失、不幸、死亡等原因失去拥有的东西等，含有不能再找回来的意思，也可指人失去了品性、信念等或陷入沉思或埋头于某事物之中。那么，lose的过去式和过去分词是什么呢？

过去式：lost

过去分词：lost

第三人称单数：loses

现在分词：losing

By that time I had lost interest in the idea. 

那时我已经对此想法失去兴趣了。

She lost it, just as I said she would. 

我就说了吧，她把它丢了。

She has lost all sense of direction in her life. 

她完全丧失了生活的方向。

He lost his place in the first team. 

他失去了在一队的资格。

The poor little thing! It's lost its mother. 

这可怜的小家伙！没有了妈妈。

Do you mean to say you've lost it? 

你是说你把那东西给弄丢了？

My application got lost in the post. 

我的申请书寄丢了。

I'm still looking for that lost file. 

我还在找那份丢失的档案。