| Answer | Crossword Clue |
|---|---|
| ought | (used to express obligation or advisability) |
| might | (used to express possibility or obligation) |
| musts | (used to express obligation or necessity) |
| must | (used to express obligation or necessity) |
| having | (used with an infinitive to express obligation) |
| hadst | (used with an infinitive to express obligation) |
| had | (used with an infinitive to express obligation) |
| has | (used with an infinitive to express obligation) |
| hath | (used with an infinitive to express obligation) |
| have | (used with an infinitive to express obligation) |
| haddest | (used with an infinitive to express obligation) |
| hast | (used with an infinitive to express obligation) |
