Sleep and Go to bed
Incorrect : I shall sleep early tonight.
Correct : I shall go to bed early tonight.
Incorrect : He has been going to bed for two hours.
Correct : He has been sleeping for two hours.
Note : "To sleep' and "to go to bed” are not synonymous. “To go to bed" denotes the act of lying down on a bed in preparation for sleep. A person does not go to bed and sleep at the same moment.
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