Bare infinitive

From Teflpedia

A bare infinitive (/ˈbeər ɪnˈfɪnətɪv/) is an English infinitive; its form simply consists of the base form of a verb; unlike a to-infinitive it lacks the particle "to".

The bare infinitive is used:

Unfortunately, in pedagogic grammar, verbs are sometimes referred to as "bare infinitives" despite their being finite verbs (i.e. possessing a subject), and therefore categorically NOT infinitives.