N5adjectivei-adjectivenegative
い-adjective - Negative
[い-adj stem] + くないです
Quick answer
[い-adj stem] + くないです means "Is not [adjective]". Mastering this N5 structure builds fluency for reading and listening. Full examples and exercises are below.
Meaning
Is not [adjective]
Explanation
Remove い and add くないです for negative.
Examples
Practice this grammar
[い-adj stem] + くないです
Which sentence correctly uses "い-adjective - Negative"?
Vocabulary from these examples
Last updated Jul 4, 2026