| Form | Conjugation | 
|---|---|
| Plain? | 歓ぶ | 
| Past? | 歓んだ | 
| Negative? | 歓ばない | 
| Volitional? | 歓ぼう | 
| Imperative? | 歓べ | 
| Polite imperative? | 歓びなさい | 
| 〜たい? | 歓びたい | 
| Conditional (〜えば)? | 歓べば | 
| Conditional (〜たら)? | 歓んだら | 
| Potential? | 歓べる | 
| Passive? | 歓ばれる | 
| Causative? | 歓ばせる | 
| Prohibitive? | 歓ぶな | 
| 〜ます? | 歓びます |