Сравнительные степени прилагательных и наречий (Comparison) Модальные глаголы (Modal Verbs) Цепочки ...

Are modal auxiliary verbs.Have to is often grouped with modal auxiliary verbs for convenience, but in fact it is.Must is a modal auxiliary verb.Is an auxiliary verb, a modal auxiliary verb.A modal verb. It is simply the verb to be plus an adjective (able) followed by the infinitive.And also with modal auxiliaries.Is an auxiliary verb, a modal auxiliary verb. We use could to.Like all auxiliary verbs, must.The main verb is always the bare infinitive (infinitive without to) .The main verb is the base verb (infinitive without to) .