Breakdown of Ma carte d'identité n'est plus valide.
être
to be
de
of / from / any (in negative sentences) / about (concerning)
mon
my
ne... plus
(not) anymore / no longer
Questions & Answers about Ma carte d'identité n'est plus valide.
Why is it n'est plus instead of n'est pas?
Why do we say carte d'identité and not just carte identité?
Does Ma match the speaker's gender or the card's gender?
Does the adjective valide change because carte is feminine?
Adjectives do have to match the gender of the noun. However, because the standard masculine form of valide already ends in an "e", it doesn't need an extra "e" added for feminine words like carte. It stays exactly the same.