Them = les (masc. & fem. plur.) = pronoun 3rd pers. plural
<em>example =</em>
<em>j'ai acheté ces vêtements = je </em><em>les</em><em> ai achetés. (vêtement = masculin)</em>
<em>j'ai acheté ces chaussures = je </em><em>les </em><em>ai achetées</em><em> </em><em>(chaussure = féminin)</em>
<em>the p. participle agree with "les" because it's a direct object and it's before the verb.... (rule with passé composé with 'avoir'. It agrees only in that case) </em>
Since etre is an irregular verb, the forms are completely different. You change it when the person you are speaking about (he, she, they, we...) changes.
I am = Je suis
You are = Tu es
He is = Il est
She is = Elle est
We are = Nous sommes
You are = Vous êtes
They are = Ils sont
They are =Elles sont
Hope it helps! If possible, could you please give Brainliest? Thanks! :D