Adverbial phrase (or adverb phrase) is the term for two or more words which play the role of an adverb. Look at these examples:
(When the multi-word adverb contains a subject and a verb (like in this example), it is an adverbial clause as opposed to an adverbial phrase.)
When (Adverbial Phrase of Time)An adverbial phrase of time states when something happens or how often. For example:
Where (Adverbial Phrase of Place)An adverbial phrase of place states where something happens. For example:
How (Adverbial Phrase of Manner)An adverbial phrase of manner states how something is done. For example:
What are adverbs?
What are adverbial clauses?
What are clauses?
What are phrases?
What are adjuncts?
Using commas with adverbs Glossary of grammatical terms
Glossary of grammatical terms
When an adverbial phrase is at the start of a sentence, it is usual to follow it with a comma.
Click on the one with an adverbial phrase: