The verbal periphrasis "haber que + infinitive" and "tener que + infinitive" express obligation or need. Their meaning is very similar to deber and the English modal verb have to. However, although haber que and tener que are very similar, they are used in different contexts. "Haber que + infinitive" is only used in impersonal sentences in the third person singular: hay que. It indicates a recommended, obligatory or necessary action for a general public (everyone) (Hay que cuidar el medio ambiente - Everyone has to take care of the environment). On the other hand, "tener que + infinitive" is used in personal sentences, and indicates an action that is recommended, obligatory or necessary for someone in particular ("Tienes que cuidar de tu hermano pequeño - You have to take care of your little brother)