| Form | Conjugation | 
|---|---|
| Plain? | 砥ぐ | 
| Past? | 砥いだ | 
| Negative? | 砥がない | 
| Volitional? | 砥ごう | 
| Imperative? | 砥げ | 
| Polite imperative? | 砥ぎなさい | 
| 〜たい? | 砥ぎたい | 
| Conditional (〜えば)? | 砥げば | 
| Conditional (〜たら)? | 砥いだら | 
| Potential? | 砥げる | 
| Passive? | 砥がれる | 
| Causative? | 砥がせる | 
| Prohibitive? | 砥ぐな | 
| 〜ます? | 砥ぎます |