あLearn Japanese Online Hub

Grammar · い-adjectives

くないです, the negative

The pattern

[stem] kunai desu

Drop the final い and add くない. The です that follows is politeness only.

The mistake to avoid

Never 高いじゃないです. い-adjectives take くない, nouns take じゃない.

Examples

Rōmaji help
takakunai desu.
It isn't expensive.
omoshirokunai desu.
It isn't interesting.
kyō wa samukunai desu.
It is not cold today.
kono heya wa hirokunai desu.
This room is not big.