1) The three categories of verbs are: verbs of being, linking verbs, and action verbs.
2) An infinitive is a verb form that is not limited to a particular person. The infinitive form means the verb is not conjugated.
3) Conjugation is when verbs change their form to match the subject of the sentence.
4) • separate the ar/er/ir ending from the verb infinitive leaving the verb stem. • make any necessary stem changes if the verb is stem changing or irregular. • add the appropriate verb ending to the stem according to the person of the subject of the verb. (assuming present tense, indicative mood)
