We danced until dawn.
An example of until is when a student can't leave school until June 1st of a specific year, which is the scheduled last day of their senior year of school.
She can't leave until Friday.
An example of until is a person running quickly up to the time they stop.
An example of until is a teenager not being able to go out before all of their chores are done.
We walked until it got dark.
I talked until I was hoarse.
Not until tomorrow.
You cannot leave until your work is finished.
Until you leave.
Heat the water until it boils.
Not until he tells you.