Phrasal verbs are multi-word verbs that, like single-word verbs, convey action of the body or mind or occurrences. Phrasal verbs consist of a basic verb + another word or words, usually a preposition or adverb. Example: speak (basic verb) + up (preposition)
Phrasal Verb:
fill up
Meaning / Example:
1. to become full. > The creek filled up after the heavy rain yesterday.
2. to fill one's gas tank. > I've got to stop and fill up. The gas tank is running low.
Phrasal verbs, also called two-word verbs, are idiomatic expressions wherein the second element of the verb (the adverb or particle) is not necessarily predictable.