Phrasal Verb: Be on

Meaning: Be functioning (of machines)

Example: The computer IS ON.

Meaning: Take place

Example: The show IS ON for the next three months.

Meaning: Take medication or drugs, especially when they affect the person badly

Example: He IS ON anti-depressants and has become very difficult to please.

Meaning: Be at the top of one’s game, performing very well

Example: He IS really ON right now- three goals in five minutes!