who do you think is the best teacher in our class?什么句型?语法上正确

额 应该是 who do you think is 是对的吧 因为 is the best teacher in our class的主语应该是“谁”,也就是who,而do you think who从语感上来说听着就不是很舒服,而且do you think 后面应该是sb.或者sth.怎么怎么样,在这个句子里加who……就不是那么个意思了
我也不是很清楚它是什么句型,也许算是疑问句吧,但是它的语法应该没有错误.
你可以先把who do you think is the best teacher in our class?中的do you think 忽略掉,也许这样你会理解,也就是“谁是我们班上最好的老师”而这个标准时由“你”来决定,所以do you think 貌似是作为who的定语