Breakdown of Il est possible qu'ils soient confiants, mais tu ne l'es pas.
être
to be
tu
you (informal singular)
mais
but
ils
they (masculine/mixed)
Questions & Answers about Il est possible qu'ils soient confiants, mais tu ne l'es pas.
Why is there an l' in tu ne l'es pas?
Since confiants is plural, shouldn't we use les instead of l'?
Why do we use soient instead of sont here?
soient is the subjunctive form of être. The phrase Il est possible que expresses a possibility or uncertainty, which triggers the subjunctive mood in the following clause.
What is the word order rule for the negation around l'es?
In a negative sentence with an object pronoun, ne comes directly before the pronoun, and pas follows the conjugated verb. This gives us the strict order of ne + l' (pronoun) + es (verb) + pas.