demain

In a sentence

• Je vais partir en vacances demain.

  I will leave for vacation tomorrow.

  In this sentence, 'demain' is used to refer to the day after today, indicating the timing of the action.

• Demain est un nouveau jour.

  Tomorrow is a new day.

  Here, 'demain' is utilized as the subject of the sentence to express the concept of the day following today.

• Elle parle toujours du lendemain sans penser au présent.

  She always talks about the future without thinking about the present.

  In this context, 'lendemain' is closely related to 'demain', referring to the day after tomorrow or a metaphorical future.