1.in表示A地在B地范围之内.如：

Taiwan is in the southeast of China.

2.to表示A地在B地范围之外,即二者之间有距离间隔.如：

Japan lies to the east of China.

3.on表示A地与B地接壤、毗邻.如：

North Korea is on the east of China.

4.off表示“离……一些距离或离……不远的海上”.如：

They arrived at a house off the main road.

New Zealand lies off the eastern coast of Australia