I looked out of the window and saw Tim on his bike cycling along the road.on his bike请教这里为什么用on 有没有具体的例子呢,
问题描述：
I looked out of the window and saw Tim on his bike cycling along the road.
on his bike请教这里为什么用on 有没有具体的例子呢,
答
那你觉得应该用什么介词呢？这边表示他看到TOM骑自行车
骑自行车当然是 on the bike
答
on his bike就是(骑)在自行车上
on就是"在...上"
He is on his bike.
He is riding on his bike.
答
在（公共交通工具）上
John got some sleep on the plane.
约翰在飞机上睡了一会儿.