Janet is in the hospital.
Frank visited Janet in the hospital.
I saw Eric at the hospital yesterday. I wonder what he was doing there.
My sister works at a/the hospital.
(我妹在醫院工作。)A: Where is your mom? B: She’s in the hospital. A: Is she alright? B: She had a heart attack the other day. She’s still in ICU.
She had a bad stomachache and had to go to the hospital.不過在英式英文裡，「住院」會說in hospital，不加冠詞
Jacob has been in hospital for two weeks.
Working in/at a hospital is usually tiring.