The past participle

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

shake, shook, shaken - trząść

The present

I shake bottles every day.
Wstrząsam butelkami codziennie.

The past

I shook the bottle yesterday.
Wczoraj wstrząsnąłem butelką.

The past participle

I have already shaken it.
Ja już to wstrząsnąłem.