都在睡觉

are all sleeping

→ 都
phrase Rare #19,211
are all sleeping Used for a group or contextually understood people who are all asleep; with a singular subject, 都 can instead emphasize that the person was sleeping throughout.
CH: 孩子们都在睡觉。
EN: The children are all asleep.

你可要好好的对他,多多可是他每天都在睡觉耶

You’d better treat him well. Duoduo sleeps all day, though.

— 魔女宅急便 (1989)

一天夜里,我们都在睡觉

One night, we were all asleep.

— 孤堡惊情 (2007)