Prepositions link words and phrases in a sentence to other words and phrases. They show the relationship between them and often (though not always) indicate if the relationship is to do with location or with time.Prepositions about location (place) include:
on, in, under, over, above, between, among, beneath, against, towards, beside, across, off, on, withinPrepositions about time include:
during, before, after, throughout, sinceOther prepositions include:
for, of, except
You will see that the same words may be prepositions or connectives. You can tell if the word is a preposition because it will come before a noun, whereas a subordinating connective introduces a subordinate clause.
The book was on the table.
The pupils were in the library.
He knew he was among friends and so he spoke freely.
'Between' is used for two things/people and 'among' for more than two things/people.
A complex preposition is where a group of words act as a single preposition, eg 'in front of'.
He was getting towards the end of the race course when he tripped over a fallen branch.
The new crossing was in front of the school gate.
On the way to school he walked between two friends.