My feet are so cold (that) I can't sleep.
I have to go to sleep soon.
Some people cannot sleep unless they lie on their sides.
I'm not really asleep, just dozing.
I don't think I can sleep until it's late.
Don't sleep with the light left on.
I spend time sleeping and not doing anything.
You should not sit up late just because it has charm.
I need sleep.
I lay down not so much to sleep as to think.
Every night I can't get a good sleep.
Wake not a sleeping lion.
眠らずに
without sleep
寝るところがない
He is dead asleep―fast asleep―sound asleep.
A sleepy feeling crept over me
A drowsy feeling stole over me.