Do复数加es吗?例如:do they have a ball?

Do复数加es吗?例如:do they have a ball? Do you have a soccer ball?意思 Do _ have a ping-pong ball? DO you have a soccer ball Do they have a soccer ball?They have a good car.这两句话,有错么?如果有 砸场勿进.——(do,does)they have a ping pong ball? How many ball pens do they have?They have fourty哪里错了 A:Lily has a tennis ball.Do you have one? do为什么加es?  求音乐：do you have a soccer ball 歌谣 初一英语do you have a soccer ball单元的. i do not have a soccer ball同义句转换