I need to sleep for eight hours every night.
I need to sleep at least eight hours every night.
I usually sleep for eight hours every night.
She sang the baby to sleep.
Eating rice, I went to sleep.
I usually go to sleep by 11:30pm.
I usually fall asleep by 11:30pm.
How many hours do you sleep everyday?
Is it okay to take this before sleeping?
He sleeps for only half an hour at noon.
She put the blanket over the sleeping boy.
Having worked all day long, he fell asleep.
He sleeps for one hour after swimming in the river.