imperative mood
词形变化：
副词: imperatively | 名词: imperativeness |
同义词：
necessary | crucial | requirement | compelling | necessity | compulsory | urgent | critical | pressing | mandatory | essential | priority | rule | constraint | obligation | must | need | important | vital | authoritative | commanding | regulation | domineering | imperious | official | bossy | insistent | inescapable | indispensable | exigent | imperative mood |
反义词：