zacznie

In a sentence

• Jutro zacznie padać deszcz.

  Tomorrow, it will start raining.

  In this sentence, 'zacznie' ("will start") functions as the third-person singular future tense form of the verb 'zacząć,' indicating the beginning of an action, specifically rain starting.

• Mam nadzieję, że on zacznie myśleć o innych.

  I hope he will start thinking about others.

  Here, 'zacznie' signifies the initiation of thoughtful consideration by a third party, emphasizing the potential change in behavior.

• Spotkanie zacznie się o godzinie dziewiątej.

  The meeting will start at nine o'clock.

  In this example, 'zacznie się' is a reflexive verb form meaning "will begin/start," with reference to a planned event (the meeting).