The verb possesses the following grammatical categories: tense, aspect, voice, mood, person, number, finitude and phase. The common categories for finite and non-finite forms are voice, aspect, phase and finitude. The grammatical categories of the English verb find their expression in synthetical and analytical forms. The formative elements expressing these categories are grammatical affixes, inner inflexion and function words. Some categories have only synthetical forms (person, number), others - only analytical (voice). There are also categories expressed by both synthetical and analytical forms (mood, tense, aspect).