在上课时睡觉英语写是Sleep in class.
Sleep：n. 睡眠; 睡觉; 睡眠时间; 一觉; 眼屎。
class：n. 班; 班级; 课; 上课; (某科目的)系列课程。
扩展资料
These students tend to sleep in class or even skip classes.
这些学生往往会在课上睡觉，甚至是选择逃课。
Some children often sleep in class.
有些小朋友上课经常睡觉。
You got plenty of sleep in class.
你在课上睡得够多了。
You should have known that you are not allowed to sleep in class.
你应该知道，上课睡觉是不允许的。
Dick: Dad, I had a long sleep in class today.
迪克：爸爸，我今天在课堂上睡了个好觉。
