observés

In a sentence

• Les oiseaux furent observés dans leur habitat naturel.

  The birds were observed in their natural habitat.

  In this sentence, 'observés' is used as a past participle indicating that the birds were the objects of observation in the past.

• Nous avons observés les étoiles avec un télescope.

  We observed the stars with a telescope.

  Here, 'observés' is a past participle that follows the auxiliary verb 'avons', referring to the action we took to study the stars.

• Les changements ont été observés après l'expérience.

  The changes were observed after the experiment.

  The term 'observés' functions as a past participle within a passive voice construction, denoting that the changes were identified or recorded post-experiment.