How long can a human being go without sleep?
人不睡觉能活多久？
He took a long time getting to sleep that night.
他那天晚上过了好长时间才睡着。
You'll feel better for a good night's sleep.
你晚上睡个好觉就会觉得好些。
You'll feel better after a good night's sleep.
你晚上睡个好觉就会觉得舒服些。
I'll feel better after a good night's sleep.
好好睡一晚，我就会觉得好些了。