ensinas

Ensinas is the second-person singular present indicative form of the Portuguese verb ensinar, meaning to teach. It is used when the subject is the informal pronoun tu, and it is most common in European Portuguese and in certain regional varieties of Brazilian Portuguese. In many Brazilian dialects that favor the pronoun você, the corresponding present form is ensina.

Usage and examples can illustrate its function: tu ensinas matemática muito bem, meaning you teach mathematics very well. In standard Brazilian Portuguese with você as the subject, the equivalent present form is ensina, as in você ensina crianças todos os dias. The form ensinas thus signals the subject and number (second person singular) in sentences about teaching or passing on knowledge.

Morphology and related forms: the infinitive is ensinar, the gerund is ensinando, and other person forms include ensino (first person singular presente) and ensina (third person singular present). The verb is transitive and often appears with a direct object specifying what is being taught.

Etymology and classification: ensinar is a regular -ar verb in Portuguese. Ensinar has a broad use across education, training, and instruction contexts, from schools and universities to informal guidance.

See also: ensino, educator, ensino-aprendizagem. Notes on dialectal variation indicate that tu forms like ensinas are more prevalent in some regions and may be less common in formal Brazilian writing, where você or outros pronomes are preferred.