- The third-person plural form of the negative verb (negation verb). The English translations include do not/don’t and not (with auxiliary verbs and be).
- The negative verb is used with the connegative form of the main verb. The indicative present connegative form is identical to the second-person singular imperative. The potential mood connegative ends in the marker for that mood, -ne-, and the conditional mood connegative ends in the marker for that mood, -isi-. In the indicative past, conditional past and potential past, the active past participle plural (ending -eet) is used. The connegative form of the main verb is always used without the personal suffix.
- Usage of eivät:
- He näkisivät. (They would see.) -> He eivät näkisi. (They would not see.)
- He olisivat nähneet. (They would have seen.) -> He eivät olisi nähneet. (They would not have seen.)
- He nähnevät. (They probably see.) -> He eivät nähne. (They probably do not see.)
- He lienevät nähneet. (They have probably seen.) -> He eivät liene nähneet. (They have probably not seen.)
- The negation verb has no infinitive form.
- Indicative, conditional and potential moods use the indicative forms (stem e-), for which the verb is conjugated only in person.
- In the imperative mood the negation verb has the stem äl-.
- An archaic optative mood exists and is used mainly in poetry.