| SG | PL | |
| 1 | debeō | debēmus (rule) |
| 2 | debes (rule) | debētis (rule) |
| 3 | debet (rule) | debēnt (rule) |
| SG | PL | |
| 1 | debēbō (rule) | debēbimus (rule) |
| 2 | debēbis (rule) | debēbitis (rule) |
| 3 | debēbit (rule) | debēbunt (rule) |
| SG | PL | |
| 2 | debē (rule) | ? (rule) |
| 3 | ? (rule) | ? (rule) |
| SG | PL | |
| 1 | debeām (rule) | debeāmus (rule) |
| 2 | debeās (rule) | debeātis (rule) |
| 3 | debeat (rule) | debeānt (rule) |
| Form | |
| Infinitive | debēre (rule) |
| Participle | debēns (rule) |
| Past Participle | debētus (rule) |