is

In a sentence

• Én is szeretem a könyveket.

  I also like books.

  Here, 'is' means 'also' or 'too', indicating inclusion in the action expressed by the verb, aligned with the subject.

• Ő is ott volt a partin.

  He was also at the party.

  In this sentence, 'is' similarly denotes 'also', referring to the additional subject participating in the event.

• A macska is alszik.

  The cat is sleeping too.

  Here, 'is' appears to add inclusion to the noun subject, signifying that this subject shares the same action as others potentially described in the context.