1. Until indicates the time of change of an activity or situation.

Pattern 1: verb + until + time
They waited until six o'clock.
The boys studied until midnight.

Pattern 2: verb + until + beginning of event
They lived here until their wedding; then they left.
She was busy until her graduation.
They didn't watch the game until halftime.

Body Facts
If you throw up and your vomit is greenish, it contains bile from further down in your intestine than just your stomach. The bile and stomach acid make vomit taste awful.      .. More >>