用英语,那是他（她）的哥哥,换成一般疑问句,否定句,肯定举,复数形式回答

一般疑问句
Is that his/her brother?
否定句
That isn't his/her brother.
肯定句
That is his/her brother.
复数形式
问:Are those his/her brothers?
答:1、肯定回答Yes,those are.
2、否定回答No,those aren't
绝对正确,选我为最佳回答吧TシT
楼上的,有两句少了be动词.§＿§