The present

The verb forms are the present, the past and the past participle.

lose, lost, lost - gubić

The present

I lose the keys every day.
Gubię klucze codziennie.

The past

She lost her keys yesterday.
Ona wczoraj zgubiła swoje klucze.

The past participle

She got lost yesterday.
Ona wczoraj się zgubiła.