What letter do you add to make an adjective plural?

Choose the feminine singular adjective

Choose the feminine plural adjective

Choose the masculine plural adjective

Choose the masculine singular adjective

Make the adjective "gris" masculine plural

Make the adjective "faible" feminine singular

Make the adjective "fort" feminine plural

Make the adjective "poilu" feminine singular

choose the masculine singular adjective

choose the masculine plural adjective

choose the feminine plural adjective

choose the feminine singular adjective

choose the feminine singular adjective

make this sentence plural: "Le drapeau vert".

make this sentence plural: "La pomme rouge".

when an adjective or noun ends in "eau", how do we make that plural?

These are all feminine EXCEPT for:

These are all plural EXCEPT for: