床的英语应该怎么说

床的英语是bed。例句：
I'm going to bed now. 我现在要上床睡觉了。
He slept on a twin-size bed in the guest room. 他在客房的一张双人床上睡觉。
The bed was so comfortable that I didn't want to get up in the morning. 这张床太舒服了，我早上都不想起床。