双重否定句中,如果添加一个反义疑问句.疑问句用否定还是肯定.

问题描述:

双重否定句中,如果添加一个反义疑问句.疑问句用否定还是肯定.

视情况而定
I don't think he isn't at home,isn't he ?
She doesn't think he isn't at home,does she?