grangpa is in good condition.
grandpa is well.WELL为什么可以，它明明是副词well 可以特别用来修饰人的健康在什么情况下呢well 做形容词时，指人的身体好，健康的a. —How is your father? —He’s very well.well 常做副词，修饰动词用。b. He speaks English well.