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.
Fact
Dr. Joel Poinsett, the 1st US ambassador to Mexico, brought the poinsettia to US in 1828. The plant, called flower of the blessed night in Mexico was renamed in Poinsett's honor.
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