Is this your dinner是什么意思

Is this your dinner是什么意思 是is this schoolbag your还是is this schoolbag yours 连成句子.is,dinner,there,your Is this your sister?的答语是? is this your sister的答语是 前面是Is this your eraser How about going out for dinner this evening的答语可以是that is right么 is this your sister 的肯定回答是?is this your sister 的肯定回答是? is this your skirt this is your Maybe this is your Is this your uncle? this is your aunt. is this your business Is this your schoolbag? Is this your (空格) Is this your schoolbag? this is your pencil