| | Positive | Negative |
| Present Indicative |
Plain | benkyou suru |
benkyou shinai |
| Polite |
benkyou shimasu |
benkyou shimasen |
| Past Indicative |
Plain |
benkyou shita |
benkyou shinakatta |
| Polite |
benkyou shimashita |
benkyou shimasen deshita |
| Presumptive |
Plain |
benkyou shiyō
benkyou suru darō |
benkyou shinai darō |
| Polite |
benkyou shimashō
benkyou suru deshō |
benkyou shinai deshō |
| Past Presumptive |
Plain |
benkyou shitarō
benkyou shita darō |
benkyou shinakatta darō |
| Polite |
benkyou shimashitarō |
benkyou shinakatta deshō |
| Present Progressive |
Plain | | |
| Polite | benkyou shite imasu |
benkyou shite imasen |
| Past Progressive |
Plain | | |
| Polite |
benkyou shite imashita |
benkyou shite imasen deshita |
| Provisional |
Plain |
benkyou sureba |
benkyou shinakereba
|
| Polite |
benkyou shimaseba
benkyou shimasureba
|
benkyou shimasen nara
|
| Conditional |
Plain |
benkyou shitara |
benkyou shinakattara
|
| Polite |
benkyou
benkyou shimashitara
|
benkyou shimasen deshitara
|
| Potential |
Plain | benkyou dekiru |
benkyou dekinai |
| Polite |
benkyou dekimasu |
benkyou dekimasen |
| Causative |
Plain |
benkyou saseru |
|
| Polite | |
|
| Imperative |
Plain |
benkyou shiro |
benkyou suruna |
| Polite |
benkyou shite kudasai |
benkyou shinaide kudasai |
Passive |
Plain | sareru |
