A negative verb or negation verb is a type of auxiliary that is used to form the negative of a main verb. The main verb itself has no personal endings, while the negative verb takes the inflection. The English auxiliary don't/doesn't performs a similar function by acting as a negative verb that indicates whether one or multiple individuals are involved while the verb referring to the negated activity remains uninflected, e.g. "he cares"/"we care" versus "he doesn't care"/"we don't care".
In English, ordinary verbs take the auxiliary when negated by .
The negative verb is typical of the Uralic languages. Uralic languages inflect by person, thus one word, the negative verb corresponds to e.g. "I don't" (Finnish en) or "doesn't" (ei).
The negative verb is conjugated in moods and personal forms in Finnish. In the present tense, the form of the main verb is just the stem of the present form without a personal ending, e.g. lähden – en lähde ("I leave" – "I do not leave"), menisit – et menisi ("you would go" – "you would not go"), syönee – ei syöne ("he/she may eat" – "he/she may not eat"), ottakaamme – älkäämme ottako ("let's take" – "let's not take"). In the imperfect tense, the form of the main verb is the past participle, e.g. otin – en ottanut ("I took" – "I did not take"), otimme – emme ottaneet ("we took" – "we did not take").
Indicative, conditional, and potential
In Estonian, the negative verb is evident only in the imperative mood.
Indicative, conditional, and oblique