1.The homework finished,I want to help my mother clean the room.
2.Since the homework is finished,I want to help my mother clean the room.
3.Because I have finished the homework ,I want to help my mother clean the room.
4.As I have finished the homework ,I want to help my mother clean the room.
5.I want to help my mother clean the room,for I have finished the homework.
6.I want to help my mother clean the room,as I have finished the homework.
7.I want to help my mother clean the room,becase I have finished the homework.