Thanks for sharing. A question

Is the following correct?

过去完成时：   "have you finished your homework before you watched TV?" her mother asked her.   “你是做完作业才看电视的吗？”她的妈妈问她。

过去完成时：   Her mother asked her if (whether) she have finished her homework before she watched TV.   她的妈妈问她是不是完成了作业才看电视。

 

 Should it changed to:

"Her mother asked her if (whether) she had finished her homework before she watched TV."