<em>Nosotros pedimos </em><em><u>en un café</u></em><em>.</em>
In the first sentence, reference is made to a coffee or <em>"tinto"</em>, which is called in some Latin American countries, while in the second sentence reference is made to the place where you can drink this product: a cafe or a coffee shop. In the case of the word "in" it is not used in Spanish separate from other words, but sometimes serves as a prefix to express a completely opposite word.
Examples:
<em>Activo - Inactivo.</em>
<em>Correcto - Incorrecto.</em>
In the case of the word <em>"cafe"</em>, regularly in Spanish has the accent on the vowel e <u><em>"café"</em></u>.
1. Tú tienes unos amigos muy interesantes. 2. Yo vengo del centro comercial en autobús . 3. Ellos no tienen suficiente dinero. 4. Todos los sábados yo voy al cine.