Pre- and post-modification

I was recently asked to explain pre- and post-modification.  

Pre- and post-modification are terms used for words, phrases and clauses that add information to a noun. By adding these you create a noun phrase.  

Premodification is where information is added before the noun, e.g determiners, adverbs, adjectives:

Post-modification is adding a phrase or relative clause (which is a type of subordinate clause) after the noun.

If we use the noun 'horse', we can, for example, add premodifiers:

the (determiner)

very (adverb)

beautiful (adjective)

and post-modifiers:

with the flowing mane (prepositional phrase)

or

which could gallop like the wind (relative clause because it starts with a relative pronoun - which - and includes a verb 'could gallop')

The very beautiful horse with the flowing mane...

The very beautiful horse which could gallop like the wind...