1.楼主首先要搞懂否定后置的定义是什么.
含宾语从句的主从复合句要属于否定后置情况,必须完全满足以下三种情况：
1）主句主语是第一人称：I和we；
2）主句时态为一般现在时；
3）主句谓语动词是think/believe/suppose/expect等.
以上三个条件如果有一个不满足,就不能称为否定后置.
2.以上三个条件都满足后,其反义疑问句变化以从句为准,且必须把主句中的否定拉回到从句中.而且如果该句为肯定句,其反义疑问句也以从句为准.
如果不是,则其反义疑问句变化以主句为准.
3.给楼主一些例句以便于理解.
1）She doesn't think you are right,does she?
主句主语为第三人称,不属于否定后置,其反义疑问句以主句she doesn't think为准.
2）I didn't think you were right,did
主句时态为一般过去时,不属于否定后置,其反义疑问句以主句I didn't think为准.
3）I don't say you are right,do
主句谓语动词是say,不属于否定后置,其反义疑问句以主句I don't say为准.
4）I don't think you are right,are you?
该句三个条件否符合,属于否定后置,其反义疑问句以从句you are (not) right为准.
5）I think you are right,aren't you?
该句虽然不是否定句,但存在否定后置的可能性,所以其反义疑问句也以从句you are right为准.