Usas don't have para negar "tener" en tiempo presente I don't have money > No tengo dinero You don't have a dog > No tienes un perro Usas haven't seguido de un pasado participio para negar un perfecto: I haven't had lunch > No he almorzado You haven't told me anything > No me has dicho nada Espero poderte haber ayudado, ¡Saludos!