zapominają

In a sentence

• Zapominają o swoich obowiązkach.

  They forget about their duties.

  Here, 'zapominają' is used as the main verb in the sentence to describe the action of 'forgetting' responsibilities.

• Dzieci często zapominają zamknąć drzwi.

  Children often forget to close the door.

  In this case, 'zapominają' is followed by an infinitive, indicating what the subject is forgetting to do.

• Niektórzy ludzie zapominają, jak ważna jest rodzina.

  Some people forget how important family is.

  Here, 'zapominają' introduces a clause explaining the specific thing that is being forgotten by the subject.