These days my classmate often sleeps, I think it is bad.What he did will affect class quality, and also can bring about homework would not do, falling grades. For him, I should advise him.
First, he should pay attention to the sleep quality. Don't think about other things, keep optimistic excess mood. So sleeping there will be no problems.
Hwever,if just because he simply don't want to listen to the class, that is bad. Now everybody is so careful in class, he should not be so banish himself. This is irresponsible to yourself .