"The baby is awake" 或者 "The baby has awakened" 是英语中最常用的表达宝宝起床的说法。
其中 "awake" 是 "醒来" 的意思，而 "awaken" 是 "唤醒" 的意思。
例句：
The baby is awake, can you please go check on him? (宝宝醒来了，你能去看看他吗？)
I heard the baby cry, she must have awakened from her nap. (我听到宝宝哭了，她一定是从午觉中醒来了。)