He thinks his sister can do very well in the exams,----?变为反意

为你解答.
He thinks his sister can do very well in the exams, （doesn't he）? （变为反意疑问）
他认为妹妹这次考试能考好,是吗?
解释：he thinks为主句的反意问句,就相应地变为否定行了,前肯后否.
再问： 是不是I think时才与从句一致？
再答： 正是。