A preguntas sin pronombre interrogativo se puede responder con un simple yes o no, pero esto es poco gentil y no se hace en inglés. En general se responde con una respuesta breve utilizando el verbo auxiliar o modal de la pregunta.

Frase interrogativa Respuesta afirmativa Respuesta negativa
Did you get here by train? Yes, we did. No, we did not (didn't).
Has he found the car in the garage? Yes, he has. No, he has not (hasn't).
Are they singing like hell? Yes, they are. No, they are not (aren't).
Does she go to the theatre? Yes, she does. No, she does not (doesn't).