stay up的意思是：不睡觉，熬夜。读音为：美 /steɪ ʌp/。
stay up late熬夜到很迟
stay up all night studying 熬夜学习
stay up to the midnight 熬到半夜
Stay up late at night 熬到深夜
1.I used to stay up late with my mom and watch movies.
2.Do you often stay up late?
3.It's bad for you to stay up too late.
4.I used to stay up late studying every night so I always overslept the next morning.
5.Many people stay up late at night, which makes them feel tired during working hours.
6.You'll laugh, you'll cry, and you'll stay up way too late reading this fabulous story.