The boy is too young to go to school,isn't he? 陈述部分是主从复合句结构时,反义疑问句的代词和动词形式应与主句中的主语和动词形式保持一致 The book is so interesting that we all like it,isn't it? He got up so late that he didn't catch the bus,didn't he?
我认为不一样,so that本身没有否定成分,根据前肯后否,后面就要用否定.而too to本身有否定成分,根据前否后肯,后面用否定. He was so tried that he can't walk,wasn't he? He was too tired to walk,was he? 这只是我个人认为,我明天再去请教下老师吧,然后告诉你准确的答案....