Phrasal Verb: Be on
Be functioning (of machines)
Example:The computer IS ON.
Example:The show IS ON for the next three months.
Take medication or drugs, especially when they affect the person badly
Example:He IS ON anti-depressants and has become very difficult to please.
Be at the top of one’s game, performing very well
Example:He IS really ON right now- three goals in five minutes!
Other Phrasal Verbs
We have 27 phrasal verbs with 'BE'