什么时候会使用 ”on”？
如果你能在交通工具上自由走动，就使用较介系词on！
举例：on a ship (在船上), on a bus (在公车上), on a plane (在飞机上), on a train (在火车上), on a ferry (在渡轮上), on a subway (在地铁上)
此外，如果我们能坐着或站在交通工具上，也使用on！
举例：on a bicycle (在脚踏车上), on a surfboard (在冲浪板上), on a motorcycle (在机车上), on a skateboard (在滑板上), on skis (在滑雪板上), on ice skates (穿着溜冰鞋), on a snowboard (在滑雪板上)
来看看老师怎么用 on the bus 吧！
什么时候会使用 “In”?
一个很好用的判断方式：如果你需要将自己缩进交通工具中，通常使用 in
举例：in a rowboat (在小船中), in a taxi (在计程车里), in a car (在车子中), in a truck (在卡车中), in a helicopter (在直升机中)
什么时候会使用 “by”？
当你提到旅行所使用的交通工具总称时，就使用 by
举例：We can travel by bike, by motorcycle, by car, by van, by lorry, by truck, by train, by plane, by bus, by ship, by tram, or by boat.
(我们可以透过脚踏车、机车、车子、箱型车、卡车、火车、飞机、公车、船只、电车来旅行)
来看看 “by 交通工具” 在日常生活中怎么使用吧！
小汇整，有没有更清楚了呢？
1.by bus ( 撘公车 ) = on a bus = take a bus
2.by car ( 开车 / 搭车) = in a car = drive / take a car
3.by taxi ( 搭计程车) = in a taxi = take a taxi
4. by plane ( 搭飞机 ) = on a plane = take a plane
5. by train ( 火车) = on a train = take a train
6. by bicycle ( 骑脚踏车) = on a bicycle = ride a bike
7. by motorcycle ( 骑机车) = on a motorcycle = ride a motorcycle
8. by horse ( 骑马 ) = on a horse = ride a horse
