他们在医院上班用英语怎么说

"They work at the hospital" 可以说成 "They are employed at the hospital." 或 "They are on duty at the hospital."

来源：这些短语均为通常使用的英语表达方式。

例句：

"She's a nurse and works at the hospital every day."
Translation: 她是一名护士，每天在医院上班。
"The doctor is on duty at the hospital today, he's available for emergency cases."
Translation: 医生今天在医院值班，可以处理紧急病例。