2. ¿Ustedes desean bailar? or Ustedes ¿desean bailar?
3. ¿Raúl estudia mucho? or Raúl, ¿estudia mucho?
4. ¿Enseño a las nueve?
5. ¿Luz mira la televisión? or Luz, ¿mira la televisión?
Explanation:
In Spanish, intonation is used for several purposes: Marking interrogative and exclamatory sentences. Topic marking and topicalization, etc. As paralinguistic and extralinguistic information) it serves to give expression to the feelings that accompany the issuance of a particular statement.
Answer: Now let's practice building some sentences in which we use the "preterite" past form of the verb to express a one-time event at a particular point of time in the past. I bought a gift (un Regalo) for my friend. Yo compré un Regalo para mi amigo(a). ... Mary bought a gift for her friend.