he thinks he will lose the game,doesn't he?这句附加疑问句为什么没用Won't

应用doesn't he
当句子的主语是“第一人称+think(s)”时,反意疑问句应借助于从句的主语和谓语动词.如：I think he is a student,isn't he?
当句子的主语是第三人称、第二人称时,反意疑问句应看主句.因此本句应用doesn't he而不用won't he.