1.at表示"在.处",一般指较小的比较具体的地点.如：
He isn't at school.He is at home.他不在学校,他在家.
2.in表示"在.内部；在.里面"的意思.如：
What is in the box?盒子里有什么?
3.on表示"在某物的上面",但两者互相接触.如：
My books are on that table.我的书在那张桌子上.
4.under表示"在某物垂直的正下方",两者之间不接触.如：
My cat is under my chair.我的猫在我的椅子下.
5.behind表示"在某物体的后面".如：
The broom is behind the door.笤帚在门后.
6.in front of表示"在.的前面",正好与behind相反.如：
There are some big trees in front of our classroom.我们教室前面有几棵大树.
7.near表示"在某物体的附近",意为"接近、靠近".如：
The ball is near the door.球在门旁边.
介词in,on,under,behind是表示静态位置的介词.
1.along：沿着…,顺着…
I'm walking along the river.
我正沿河而行.
2.across：从一边到另一边,在…那边
There are many trees across the river.
河对岸有很多树.
3.towards：向…,朝…
I'm walking towards the house.
我正朝房子走去.
4.in front of：在…的前面
There is a fruit tree in front of the house.
房子前面有一棵果树.
5.behind：在…之后
There is another fruit tree behind the house.
房后还有一棵果树.
6.into：到…里,进入内部
I want to go into the house.
我想走进房子.
7.inside：在…的里面,在…内部
I am inside the house now.
我正在房子里.
8.outside：在…外面
Now I am outside the house.
我现在来到房外.
9.in：在…里,表示在含有空间感的范围或物体之中
There is nobody in the house.
房子里面没有人.
10.above：在…之上,表示高于,不是垂直的
There are lots of apples above my head.
我的头顶上有很多苹果.
11.under：在…正下方,强调垂直在…之下
I want to have a rest under the tree.
我想在树下休息一会儿.
12.off：从…脱落,从…掉下
on：在…之上,与…表面相接触
An apple falls off the tree and hits me on the head.
一只苹果从树上掉下砸在我的头上.