The fifth grammatical form that performs the grammatical function of adverbial is the verb phrase. Verbs are traditionally defined as "words that indicate an action or state of being." Verb phrases are phrases with a verb functioning as the head of the phrase plus any auxiliary verbs, prepositions, prepositional phrases, adverb phrases, and determiners functioning as progressives, perfects, passives, operators, modals, particles, verb phrase modifiers, verb phrase complements, and determinatives. For example:
- Running on the ice, the child slipped and fell down. (How and why did the child slip and fall down?)
- Please open the window to let in some fresh air. (Why open the window?)
- To make eggnog, begin with fresh eggs. (Why begin with fresh eggs?)