je faisais un essai = I made an attempt, I tried
je suis un avion means 'I am a plane' in French.
Je cherche un homme is 'I'm looking for a man' in French.
je regarde un film means 'I am watching a movie' in French.
Essai OR Un Test
je mets un uniforme (masc.) means "I wear / I'm putting on an uniform"
Je cherche un correspondant means 'I am looking for a pen pal' in English.
It is French for "I am a friend."
je t'aime toujours et un jour = I still love you and a day je t'aime [pour] toujours et un jour : I love you for ever and a day
It depends on the sense of the word. It could mean an essay, a written text with a set of characteristics. It could also mean a try, as in give it a try.
I am a pupil
I take a bath.
I don't have one anymore