将下列句子改成 倒装语序

将下列句子改成 倒装语序
He did not go to bed until 12 o＇clock.
将其改写成 以not开头的倒装句 怎么改

Not until 12 o＇clock did he go to bed.
再问： 为什么这样改啊
再答： not … until，until A. until表示动作、状态的持续，强调“一直到……为止”，或强调某个动作或状态一直持续到另一个动作或状态出现之前。常与表示延续性动作的动词连用。 如： * I waited until three o’clock, but he didn’t come. * He lived with his parents until he graduated from college. B. not … until表示“到……为止；直到……才”，常与表示瞬间性动作的动词连用。 如： * The noise of the street didn’t stop until midnight. * The children didn’t come home until it was dark. * I didn’t know the truth until you told me.
再问： 哦 知道了