Breakdown of Le magasin n'est pas ouvert aujourd'hui.
être
to be
le magasin
the store
ne
not (used before the verb)
pas
not (used after the verb)
Questions & Answers about Le magasin n'est pas ouvert aujourd'hui.
Why does this sentence use ouvert instead of the present tense verb ouvre?
Ouvert is the past participle of the verb ouvrir (to open), and in this sentence it acts as an adjective meaning "open". You could also use the present tense verb and say Le magasin n'ouvre pas aujourd'hui (The shop doesn't open today). Both mean practically the same thing, but this sentence specifically says "is not open".
Does ouvert change depending on what is open?
Why is the negation written as n'est pas instead of ne est pas?
Do I pronounce the t at the end of ouvert?
No, the t at the end of ouvert is completely silent. You only pronounce the t sound if you are using the feminine version of the word, ouverte.