1) Verbs are words that indicate actions, states of being, or emotions. They may vary in form depending on factors like tense, voice, and whether they agree with the subject.
2) Verbs are divided into transitive verbs (which take a direct object) and intransitive verbs (which do not). Linking verbs connect the subject to a word that renames or describes it. Helping verbs convey additional information like time or possibility.
3) Irregular verbs have unpredictable past tense or past participle forms, while regular verbs follow predictable patterns. There are over 16 tenses in English depending on combinations of aspects like time, continuation, and completeness.