on my bike和by bike的区别

例句：I'm going by bike, and you may go by bus.我呢，骑自行车去，你们呢，坐汽车去。Are you to go there by bike or by bus? 你骑车还是坐车去？Father fitted a new tyre on my bike.父亲给我的自行车安上了新的外胎。I can take it to school on my bike.我能用我的自行车把它带到学校去。