“卧床”常见的英语表达是 “be confined to bed” 或 “stay in bed”，以下为你详细介绍：
含义：强调因身体原因或健康状况而不得不待在床上，有一种被迫、无法自由活动的意味。
例句：
She was confined to bed for a week due to a severe flu.（她因患重感冒卧床一周。）
After the surgery, he was confined to bed for several days.（手术后，他卧床了好几天。）
含义：侧重于描述待在床上的状态，可能出于休息、生病等原因，相对比较口语化，使用场景较为广泛。
例句：
If you're feeling tired, just stay in bed and have a good rest.（如果你觉得累了，就待在床上好好休息一下。）
The doctor advised her to stay in bed for at least three days.（医生建议她至少卧床三天。）