是否存在双重否定的反义疑问句?

是否存在双重否定的反义疑问句?我想请教个关于反义疑问句问题~I don't think he isn't a good student,____?这个句子双重否定,所以后面的问句部分用isn't合适否?She don't think he isn't a good student,____?虽有两处否定,但是第三人称作主,所以看主句用do she正确否?其实我没见过那么“委婉”的句子,是不是根本不存在?She don't think he isn't a good student,____?改为She doesn't think he isn't a good student,____?主从复合句的问句谓语要视主句人称的不同情况来判断，一楼的答案是不正确的。