'I just didn’t see them. I drove through the traffic lights when they were red.' 'He wasn’t tall enough and couldn’t climb over the fence.' In these two examples, through and over are prepositions and ...

A preposition is a word that tells you where or when something is in relation to something else. Examples of prepositions include words like 'after', 'before', 'on', 'under', 'inside' and 'outside'.