What are Phrasal Verbs?

Phrasal verb is the name given to an English verb which is composed of two or three words. One verb is combined with a preposition (like on, in, under) or an adverb (like up, down, away). Sometimes a phrasal verb can have a meaning that is very different to the meaning of at least one of those two or three words separately. Some text books call these verbs multi-word verbs. Phrasal verbs are used more frequently in everyday speech than in formal, official writing or speaking.

Here are some examples:

To Live Down
Jose will never live down singing that song at the karaoke bar.
To Fill Up
Fill the car up with unleaded gas, please.
To Occur To
It didn't occur to us that we had left the iron on.
To Call Off
They called the picnic off because of the rain.
To Keep Off
Keep the cat off the couch.