has she?
首先,一般反义疑问句如果是宾语从句,以主句的主语为基准,但是i think 是例外,主语根据从句的主语来定.
其次,从句中的never看做否定词,表否定意思,所以把从句看做一个否定句.前否后肯,另外时态要与从句一致,用现在完成时（have/has+过去分词）,所以要用has she
如：he thinks he has never watched such a great film,has he?
注意点：在i think 这种特殊情况中,如果遇到开头是i don`t think……的话,要把do not 中的not 还原到从句中,看作否定.
如：i dont think he is a good teacher,is he?