Final answer:
The sentence ¿De dónde eres usted? is incorrect. The correct form is ¿De dónde eres? or ¿De dónde es usted?
Step-by-step explanation:
The sentence ¿De dónde eres usted? is incorrect as written. The correct form should be ¿De dónde eres? or ¿De dónde es usted? depending on the context. The phrase ¿De dónde eres? means 'Where are you from?' and is used when addressing someone informally, while ¿De dónde es usted? means 'Where are you from?' and is used when addressing someone formally or respectfully. The addition of 'usted' in the original sentence is unnecessary and incorrect.
Learn more about Spanish greetings and introductions