Being healthy is critical, 健康很重要 （我想你说的是保持健康很重要,而不是健康这个东西很重要,所以health is important肯定不对）
i am healthier than you, 我比你健康
i am as healthy as her, 我和她一样健康
i am less healthy than him, 我不如他健康
water is more important than food, 水比食物重要
water is as important as food,水和食物一样重要
you are supposed to do more exercises, 你应该做更多的锻炼
you are not supposed to eat too many candies, 你不应吃太多糖
water is less important than food水不如食物重要
----客官,我的服务您满意不