適切 (tekisetsu) conjugation
appropriate, adequate, relevance
適切 (てきせつ, tekisetsu) is a na-adjective. Na-adjectives behave like nouns. The word itself never changes — you conjugate だ/です after it, and you need な to put it in front of a noun.
Conjugation table
| Form | Plain (casual) | Polite (~です) | When you use it |
|---|---|---|---|
| Dictionary / plain | 適切だ tekisetsuda | 適切です tekisetsudesu | The form you look up. Also the casual “is ~”. |
| Negative | 適切じゃない tekisetsujanai | 適切じゃないです tekisetsujanaidesu | “is not ~”. |
| Past | 適切だった tekisetsudatta | 適切でした tekisetsudeshita | “was ~”. |
| Past negative | 適切じゃなかった tekisetsujanakatta | 適切じゃなかったです tekisetsujanakattadesu | “was not ~”. |
| Te-form | 適切で tekisetsude | — | Links to the next clause: “~ and …”. |
| Adverb | 適切に tekisetsuni | — | Turns it into “~ly”, describing a verb. |
| Before a noun | 適切な〜 tekisetsuna〜 | — | How it attaches when it modifies a noun. |
| Conditional (~ば/なら) | 適切なら tekisetsunara | — | “if it is ~”. |
| Conditional (~たら) | 適切だったら tekisetsudattara | — | “if / when it is ~”. The everyday conditional. |
| Become (~なる) | 適切になる tekisetsuninaru | 適切になります tekisetsuninarimasu | “becomes ~” — the change-of-state form. |
| Too much (~すぎる) | 適切すぎる tekisetsusugiru | 適切すぎます tekisetsusugimasu | “too ~”. |
| Looks ~ (~そう) | 適切そう tekisetsusou | 適切そうです tekisetsusoudesu | “looks / seems ~” from appearance. |
🔊 Tap any Japanese word to hear it spoken.
Why it conjugates this way
Na-adjectives behave like nouns. The word itself never changes — you conjugate だ/です after it, and you need な to put it in front of a noun.
See the full rules in the adjective conjugation guide.