What are the different types of adverbials?

An adverbial is a word or group of words that modifies a verb, an adjective, an adverb, or a whole clause.

Adverbs (e.g., “quickly”) are one-word adverbials. Adverbial phrases (e.g., “after dinner”) and adverbial clauses (e.g., “although it’s raining”) are adverbials formed using multiple words.