Mr Brown,our teacher ,comes to our classroom.在英语中这是什么句型

our teacher 是同位语...可是 同位语不是类似于 information has beenput forwardthat moremiddleschool graduates willbe admitted intouniversities.的吗是啊 has beenput forward是定语从句that 后面是解释前面的 所以是同位语 上面的也一样啊 补充说明 Mr Brown 的啊