hurt 做不及物动词时后面什么也不加,不能用被动语态,比如你的两个句子.
Some people realize that they can (be hurt) very badly.
只能使人受伤 hurt people倒过来就是people get hurt被动
He hurt himself.He was hurt.
而hurt 作为及物动词时,就可以用被动语态,或者后面接宾语.
如果你不小心割破了手指,有人问你：Does it hurt?
是说你的手指痛吗?不是说它伤你吗.