duration as bare adverb

She was unconscious for a full day after the accident.

She kept me standing for as long as two hours.

She was tied up cooking all afternoon.

She extended her stay by five days.

She moved the clock hands forward by 10 minutes.

She kept me waiting for 30 minutes.

She was shy in high school.

She had to practice piano for two hours.

She's been laid up sick for the past week.

The train was two hours late because of the blizzard.

There are two pounds of butter in the refrigerator.

After dinner, I study my schoolwork for three hours.

She kept him waiting for a long time.

She kept him waiting for thirty minutes.

She was there in the morning.

She was there the whole morning.

The train is 30 minutes behind schedule.