The present

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

sleep, slept, slept - spać

The present

I love to sleep.
Uwielbiam spać.

The past

I slept well yesterday.
Wczoraj spałem dobrze.

The past participle

I have slept four times this week.
W tym tygodniu spałem cztery razy.