I have the following two questions :
¿Nos vendáis vuestro coche? --> Sí/(No, no) Os lo vendamos.
¿Visitáis hoy a Antonio? --> Sí/(No, no) nos lo visitamos.
My question is how can I recognize which question I will have to use the verb as the subject for example in second question the subject is nos and we have visitamos which appiles to nos. Unlike the first question we have os and we don't have vendais we have vendamos which apply to nos that doesn't appear in the answer unlike the second question.
Any methods/tip how to find the right verb?