壮大 (soudai) conjugation
magnificent, grand, majestic
壮大 (そうだい, soudai) 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 | 壮大だ soudaida | 壮大です soudaidesu | The form you look up. Also the casual “is ~”. |
| Negative | 壮大じゃない soudaijanai | 壮大じゃないです soudaijanaidesu | “is not ~”. |
| Past | 壮大だった soudaidatta | 壮大でした soudaideshita | “was ~”. |
| Past negative | 壮大じゃなかった soudaijanakatta | 壮大じゃなかったです soudaijanakattadesu | “was not ~”. |
| Te-form | 壮大で soudaide | — | Links to the next clause: “~ and …”. |
| Adverb | 壮大に soudaini | — | Turns it into “~ly”, describing a verb. |
| Before a noun | 壮大な〜 soudaina〜 | — | How it attaches when it modifies a noun. |
| Conditional (~ば/なら) | 壮大なら soudainara | — | “if it is ~”. |
| Conditional (~たら) | 壮大だったら soudaidattara | — | “if / when it is ~”. The everyday conditional. |
| Become (~なる) | 壮大になる soudaininaru | 壮大になります soudaininarimasu | “becomes ~” — the change-of-state form. |
| Too much (~すぎる) | 壮大すぎる soudaisugiru | 壮大すぎます soudaisugimasu | “too ~”. |
| Looks ~ (~そう) | 壮大そう soudaisou | 壮大そうです soudaisoudesu | “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.