Statements of advice can be in the form of a command, in the form of telling a person what he or she is obligated to do, or as a statement of advice using the subjunctive mood. All three methods have parallels in English.
Commands: Commands may go beyond the point of being advisory, depending on the context, tone of voice and whether your command is direct or indirect. In context, commands (also known as use of the imperative mood) such as these can be understood as either advice or a demand:
- Habla tú a la policía, y diles que tu vecina está loca. Talk to the police and tell them your neighbor is crazy.
- Compre el producto, no el proveedor. Buy the product, not the provider.
- No salgas ahora. Don't leave now.
The common ways of expressing obligation are the uses of "tener que + infinitive" and "deber + infinitive." When giving advice, you can soften the tone by using a conditional form of deber:
- Deberías estudiar un poco acerca de las opciones. You ought to study a little bit about the choices.
- Deberías escoger productos lácteos que son bajo en grasas. You should choose dairy products that are low in fat.
- Deberían ustedes ser más positivos. You should be more positive.
- aconsejar: to advise
- sugerir: to suggest
- proponer: to propose, to put forward (an idea)
Here are some examples of these verbs in use:
- Te aconsejo que me olvides. I suggest that you forget me.
- Te aconsejo que te cases en tu propio país. I advise you to get married in your own country.
- Sugiero que se pueda desactivar el foro. I suggest that you deactivate the forum.
- Le sugerimos que visite nuestro sitio regularmente. We suggest that you visit our site regularly.
- Sugiero que te comuniques con el centro meteorológico de tu ciudad. I suggest you communicate with your city's weather center.
- Te propongo que escribas un articulo con lo que sabes de este señor. I suggest you write an article based on what you know about this gentleman.
- Te proponemos que dediques 3 minutitos a contestar este cuestionario. We ask you to spend just three short minutes answering this questionnaire.

