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.

Daily Health Tips

What you need to know about combining foods Rule 3

The second important rule for food combining is to avoid mixing proteins and fats at the same meal. Fat in foods inhibits the secretion of gastric juice through the small wall. Thus when fat-concentrated foods are taken with protein foods, gastric catabolism will decrease by the degree of liquid concentration in the stomach. Fat will remain undigested in the stomach until gastric juices complete their work on the complex protein molecule. Although all primary protein foods contain high concentration of fat, such lipids will be held in suspension, awaiting catabolism in the intestine, without impeding gastric action. Free fats like oil, butter, and milk tend to coat the gastric mucosa, thereby inhibiting its effort to secrete gastric juice. Fat surrounding fried foods is also regarded as free fat and it interferes with gastric catabolism.