痛切 (tsuusetsu) conjugation
keen, deep
痛切 (つうせつ, tsuusetsu) 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 | 痛切だ tsuusetsuda | 痛切です tsuusetsudesu | The form you look up. Also the casual “is ~”. |
| Negative | 痛切じゃない tsuusetsujanai | 痛切じゃないです tsuusetsujanaidesu | “is not ~”. |
| Past | 痛切だった tsuusetsudatta | 痛切でした tsuusetsudeshita | “was ~”. |
| Past negative | 痛切じゃなかった tsuusetsujanakatta | 痛切じゃなかったです tsuusetsujanakattadesu | “was not ~”. |
| Te-form | 痛切で tsuusetsude | — | Links to the next clause: “~ and …”. |
| Adverb | 痛切に tsuusetsuni | — | Turns it into “~ly”, describing a verb. |
| Before a noun | 痛切な〜 tsuusetsuna〜 | — | How it attaches when it modifies a noun. |
| Conditional (~ば/なら) | 痛切なら tsuusetsunara | — | “if it is ~”. |
| Conditional (~たら) | 痛切だったら tsuusetsudattara | — | “if / when it is ~”. The everyday conditional. |
| Become (~なる) | 痛切になる tsuusetsuninaru | 痛切になります tsuusetsuninarimasu | “becomes ~” — the change-of-state form. |
| Too much (~すぎる) | 痛切すぎる tsuusetsusugiru | 痛切すぎます tsuusetsusugimasu | “too ~”. |
| Looks ~ (~そう) | 痛切そう tsuusetsusou | 痛切そうです tsuusetsusoudesu | “looks / seems ~” from appearance. |
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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.