The Preposition

Preposition means ‘placed before’, therefore a preposition is a word usually placed before a noun. It shows the relation of the noun before which it is placed to some other person or thing.

Example: The girl is in the classroom.

In this sentence ‘in’ shows us the relation between the girl and the classroom.

Prepositions are used with nouns or pronouns to make a phrase.  

at five o'clock.

behind me.

Prepositions mainly express time or place.

Over, under, till, above, since…

Many prepositions used as adverbs.

Go in and look around.

Prepositions:

About: "About" has the meaning:

a. Concerning:

I want you to tell me about your work.

I shall be thinking about you all the time you are away.

b. Approximately:

I'll see you at about six o'clock.

c. In various directions or places:

You will be warm enough if you move about.

d. Happen (with come):

I hear that Ahmad has broken his leg, how did that come about?