a verbal adjective ending in -ing , also called a "present participle".
a verbal adjective that describes obligation or necessity, equivalent in form to the future passive participle.
gerundial
A verbal noun formed from the infinitive of a verb.
A non-finite verb form considered neutral with respect to inflection; depending on language variously found used with auxiliary verbs, in subordinate clauses, or acting as a gerund, and often as the dictionary form.
The infinitive mood or mode (a grammatical mood).
Unlimited; not bounded or restricted; undefined.
Formed with the infinitive.