句子有错,应该是：Do your parents go to work by bus
肯定回答：Yes,they do.
否定回答：No,they don't.他是问，你的爸妈去上班是坐公共汽车吗？答句应该是No,my parents go towork接同类词Yes,myparents gotowork by busYes,myparents gotowork by bus.No,myparentsdon'tgotowork by bus.