A反义疑问句，就是主语里面是肯定句的疑问句就改成否定句，主语里面是否定的疑问句就改否定。比如Tom is at home，isn'the？Tom isn't at home，is he？但是你的这句句子前面的主语是I，主语是I 或者we的话，比如I think，I don't think怎么怎么样，反义疑问是针对后面这个“Tom is at home”的，而不是“I don't think Tom is at home”，所以疑问句主语是he但是，主语不是I的话还是改原句，比如She think Tom is at home， doesn't she？
