A preposition is a word that shows the spatial (space), temporal (time), or logical relationship of its object to the rest of the sentence. The words above, near, at, by, after, with and from are prepositions.
Above means over or higher. The cloud is above the mountain.
When something is around something, it is near or close to it.
When you are behind something, you are to the back of it.
When something is between, it is located in a position separating two other items.
The bird is in the cage.
The girl on the right is in front of the bricks.
The bird is inside the cage.
The vase is on the table.
He is going out the door.
When you are outside, you are not in a building or other structure.
The cloud is over the mountain.
The cat is under the table.
With means in the company of or having. The children are with each other.