fight的过去式和过去分词是什么

　　Police tried to separate the two men who were fighting.

　　警察力图把两个打架的人分开。

　　She'll fight like a tiger to protect her children.

　　她为了保护孩子，可以凶得像只老虎。

　　Throughout his years in prison, he fought to clear his name.

　　在整个服刑期间，他奋力证明自己名誉的清白。

　　They fought both at sea and on land.

　　他们在海上和陆上都打过仗。