For example:

Ma söön (I eat) becomes Ma ei söö (I don’t eat).

Negative Sentences with Main and Auxiliary Verbs

When constructing negative sentences involving auxiliary verbs, the negation particle ‘ei’ is placed before the auxiliary verb. The main verb, in turn, adopts the da-infinitive form:

For example:

Ta on teinud (They have done) becomes Ta ei ole teinud (They have not done).

Negating Other Parts of Speech

In addition to verbs, other parts of speech, such as adjectives, adverbs, and pronouns, can be negated. In these instances, the negation particle ‘mitte’ is generally used:

For example:

Hea mõte (good idea) becomes Mitte hea mõte (not a good idea).

Imperative Mood in Negative Sentences

When negating the imperative mood, the negation particle ‘ära’ is used instead of ‘ei’. The particle ‘ära’ is inserted before the verb in its stem form:

For example:

Söö! (Eat!) becomes Ära söö! (Don’t eat!).

Emphatic Negation

In Estonian grammar, negative sentences can be made more emphatic by adding the word absoluutselt (absolutely) before the negation particle:

For example:

Ta ei räägi inglise keelt (They don’t speak English) could be changed into Ta absoluutselt ei räägi inglise keelt (They absolutely don’t speak English) for more emphasis.

In summary, constructing negative sentences in Estonian grammar necessitates the appropriate use of negation particles, such as ‘ei’, ‘ära’, or ‘mitte’, with precise placement depending on the type of verb and form being negated. Understanding these nuances will enable eloquent expression and proper communication in the language.