when he was a boy he used to go there and watch 为什么不能加bikes's repairing
问题描述：
when he was a boy he used to go there and watch 为什么不能加bikes's repairing
答
bike是一个无生命的物体,后面不能加属格.
可以改成the repairing/repair of bikes.
又如：笔的颜色不能翻译成：pen's colors
而应该是：the color of pens