ON:
1. I left my wallet on the sofa.
2. The book was lying on the table.
3.He was standing on the floor;
4. We were sitting on the bus; I got on the wrong bus. (明明在巴士内还使用 "on"; 不用" in the bus"!
5. The bus stopped and we got on.上车
6. He knocked on the door.
IN:
(a) a chair in the garden.
(b) the letter was in the wastebasket.
(c) My mother is in the house; in London; in bed. （表示地点、场所等）在...里
(d) He put his hand in his pocket.