Just change it into I must go then it s easier to analyze go here is the full verb that is in its infinitive and follows the modal auxiliary must without to I have to go have to is the substitute form for must go again is the full verb in its infinitive Have to here is a fixed expression and...
ESL General English Grammar Questions
by
pemmican
4 yr 338 days ago
Verbs, Prepositions, Tenses, Nouns, Pronouns, Auxiliaries, Present Tenses, Modals, Gerunds, Predicates, Expressions, Modal Auxiliaries