Jim's father mended the car.It was broken 怎样用过去完成时把这两句话连成一句话?

问题描述:

Jim's father mended the car.It was broken 怎样用过去完成时把这两句话连成一句话?
请注意看要求:用过去完成时把两句话连成一句话!

Jim's father had mended the broken car;
Jim's father had mended the car which had broken;