Breakdown of Non, le mien est rouge.
être
to be
non
no
le mien
mine (masculine singular; also la mienne, les miens, les miennes)
rouge
red
Questions & Answers about Non, le mien est rouge.
Why is there a le before mien? Doesn't that mean "the mine"?
Yes, it literally translates to "the mine"! In French, possessive pronouns like le mien (mine), le tien (yours), and le sien (his/hers) always require a definite article (le, la, or les). You can never just use mien on its own.
How do we know to use le mien instead of the feminine la mienne?
Does the adjective rouge need to match le mien?
Yes, adjectives must agree with the subject they describe. Here, le mien is masculine singular. The adjective rouge (red) happens to end in an "e" in its base masculine form, so it looks the exact same whether it is masculine or feminine. But if the color was green, it would be vert for le mien and verte for la mienne.
How would this sentence change if I were saying "No, mine are red" (plural)?