一、介词规则：
by：骑车、乘（驾）车、乘船、乘飞机可以使用介词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：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.
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.
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. （√）
学识谷
