You'd better go to bed and nurse that cold.
你最好上床睡覺，把感冒治好。
Please turn the television off before you go to bed.
睡覺前請關上電視。
I go to bed early as a rule.
我一貫睡得早。
I think I'll have a bath and go to bed.
我想洗個澡，然后睡覺。
I go to bed early if I'm travelling the next day.
如果第二天去旅行我就早睡。