mantennos

In a sentence

• Por favor, mantennos informados sobre el progreso del proyecto.

  Please, keep us informed about the progress of the project.

  Here, 'mantennos' is used as a second-person singular imperative verb form (from 'mantener') combined with the pronoun 'nos', meaning 'keep us'.

• Mantennos en tus pensamientos durante este difícil momento.

  Keep us in your thoughts during this difficult time.

  In this sentence, 'mantennos' expresses a request in the imperative mood, asking to keep the persons addressed in one's thoughts.

• Siempre nos dices que mantennos unidos como familia es fundamental.

  You always tell us that keeping us united as a family is essential.

  While 'mantennos' is not in imperative form here, this structure suggests the notion of maintaining unity as a collective, understood as an indirect expression.