The sky is over our heads.
天在我们的头顶上。
The plane is flying above clouds.
飞机在云上飞行。
（2）under 和below
相同点：两者均表示“在….的下面”的意思。
不同点：under 表示“在….的正下方”，其反义词是over.
over under
There is a ball over two boxes.
There is a ball under a box
There is a bridge over the river.
below 表示“在…..的下面”，但只是低于某一点，不强调是否在正下方。From the top of the hill, we could see the blue ocean below.
The dead sea is below sea level.
(3) in 表示位置，意为“在…里面”，也可以用来表示在一个很大的空间内。Mary works in a bank.
There isn’t a cloud in the sky.
What’s in the box?
He put his hands in his pockets.
(4) at 表示“在某地点”。
I will wait for you at the station.
(5) around 和about 均表示“在…周围”。
They sat around the table.
