Post-positive adjectives

1. Most adjectives can occur both before and after a noun: 

the blue sea	~ the sea is blue
the old man	~ the man is old
happy children	~ the children are happy

*Note that the examples adjectives do not occur immediately after the noun. Instead, they follow a verb.  

2. A postpositive adjective is an adjective that appears after the noun that it modifies.

In this case there is NO VERB and the adjective appears immediately after the noun

3.  Postposition is obligatory when the adjective modifies a pronoun: 

something useful  
everyone present  
those responsible 

4. Postpositive adjectives are commonly found together with superlative, attributive adjectives: 

the shortest route possible  
the worst conditions imaginable  
the best hotel available

5. In general, postpositive adjectives usually sound unnatural in English, but there are a few commonly used set phrases —for example:

• accounts payable
• attorney general
• body politic
• court martial
• God almighty
• heir apparent
• notary public
• poet laureate
• postmaster general
• time immemorial
• words unspoken