N5copulapolitenegative
じゃないです (ja nai desu) - Negative Copula
[Noun/Na-adj] + じゃないです
Quick answer
[Noun/Na-adj] + じゃないです means "Is not (polite)". Mastering this N5 structure builds fluency for reading and listening. Full examples and exercises are below.
Meaning
Is not (polite)
Explanation
じゃないです is the polite negative form of です.
Examples
静かじゃないです。
しずかじゃないです。
It is not quiet.
Practice this grammar
[Noun/Na-adj] + じゃないです
Which sentence correctly uses "じゃないです (ja nai desu) - Negative Copula"?
Vocabulary from these examples
Last updated Jul 4, 2026