No,I visit my grandparents,这句的前一句是什么?

问题描述:

No,I visit my grandparents,这句的前一句是什么?
还有这句:Yes,I play the piano,这句的前一句,就是问句

Do you visit your parents?
Do you play the piano?第一句错了哦,这两句都是用Do you 来回答的吗?