使用交通工具要讲“规则”
水、陆、空，路路通，交通可是很方便！不过，你要知道使用交通工具是要讲究"规则" 的
一、介词规则
by条款：骑车、乘(驾)车、乘船、乘飞机可以使用介词by。
1.by 后跟"光棍"名词，即名词不加任何修饰。如：by bike/bus/car/train/ship/boat/plane。
如：She is going to the Great Wall (长城) by car/ bus.
2. by ship 可用by sea表示;by plane 可以用by air 表示。如：
a. How long does it take by ship/sea?
b. They often come back by plane/air.
in/on条款：步行、骑车、乘车、乘船、乘飞机可以使用介词 in/on。
1.步行只可用on foot。(注意：步行不用by foot)
如：Sometimes I go to school on foot.
2. 骑自行车须用介词 on ：on a/ one's bike。
3. 乘车、乘船、乘飞机可用in也可用on： in/ on a bus/train/ship/boat/plane。
4. 乘坐小汽车应使用 in a car，不用 on a car。
条款说明(一)
1. "by +名词"短语，多可以用in/on 短语替换来表示"骑、乘"之意。如：
a. His father goes to work by bike.
→His father goes to work on a bike.
b. They go to the railway station (火车站) by car.
→They go to the railway station in a car.
2. by sea，by air 是一种比较随便的口语结构，故不宜用in 短语和on短语进行改写。即：
by sea 不可用in/on the sea 替换；by air不可用 in/on the air 替换。
二、动词规则
以上出行活动皆可以选择性地用动词walk, ride, take, drive 来表示。
1. 步行用walk (to)。如：She walks home every day.
2. 骑车用ride a bike。如：Can you ride a bike to go there?
3. 乘车用 take a bus/train。如：I will take a bus/train to go to Beijing.
4. 乘飞机用 fly (to ) 或 take a plane。如：We are flying to England next week.
5. 乘(驾)小汽车用 drive a car。如：They will drive a car to go to the USA.
条款说明(二)
动词规则不能与介词规则相结合使用，尤其是动词walk, fly 。如：
She walks home on foot every day. (×)
a. She goes home on foot every day. (√)
b. She walks home every day. (√)
He will soon fly to London by plane/air. (×)
a. He will soon fly to London. (√)
b. He will soon go to London by plane/air. (√)
