A:You didn't change your mind,did you?B:（A.No,I didn't.）.
你没改变主意,对吧?是的,我没变.
对否定句的回答有两种,分别为：
Yes,I did.(不,我改变主意了.)
No,I didn't.(是的,没有).
翻译的时候要注意yes和no表达的含义.