try既可用作及物动词，也可用作不及物动词。作及物动词意思是“试图、努力尝试、试验、试用、试着推（或开）（门，窗等）、审理、审判、考验、磨练、折磨、使苦恼。”不及物动词意思是“试图、努力、试验、尝试”等意思，那么try的过去式和过去分词是什么呢？

过去式：tried

过去分词：tried

现在分词：trying

第三人称单数：tries

I think it's time we tried a fresh approach.

我认为是尝试新方法的时候了。

As a student he tried communal living for a few years. 

当学生时他尝试过几年集体生活。

She tried to be more positive about her new job.

她力求对新工作更有信心。

She has tried to lead a good life.

她努力规规矩矩地生活。

I tried to get a shot of him in the water.

我试着给他拍一张在水中的照片。

I tried to call you but I couldn't get through.

我给你打电话了，可是怎么也打不通。

I shut my eyes and tried to go to sleep.

我闭上了眼睛想睡。

I have never tried to hide the truth about my past.

我从未设法隐瞒我的过去。

He tried to push the heavy door open.

他试图推开那扇沉重的门。