See also phrasal categories.

It is also possible for a sentence to be well-formed at the lexical, syntactic, and semantic levels, but ill-formed at the pragmatic level because it is inappropriate or inexplicable in context. For example, "Try to hit the person next to you as hard as you can" would be pragmatically ill-formed in almost every conceivable situation in a lecture on natural language processing, except in quotes as an example like this. (It might however, be quite appropriate in some settings at a martial arts lesson.)

1. 
   In NLP, equivalent to verb phrase, used in the analysis of a sentence into a subject and predicate.


2. 
   In logic, a predicate is a logicalformula involving predicate symbols, variables, terms, quantifiers and logical connectives.


3. 
   In Prolog - see here.

On general context-free grammars, a vanilla predictive parser takes exponential parsing time (i.e. it can be very very slow). See also bottom-up parsers.

Prepositions are the head items of prepositional phrases.

Preposition is often abbreviated to PREP.

PREP is a lexical grammatical category.

Prepositional phrases normally consist of a preposition followed by a noun phrase.

The main exception is the possessive clitic's, as in "my uncle's car", where the 's functions as a preposition ("my uncle's car" = the car of my uncle") but follows the noun phrase that the preposition normally precedes.

Occasionally other structures are seen, such as "these errors notwithstanding", an allowable variant on "notwithstanding these errors" ("notwithstanding" is a preposition).

PP is a phrasal grammatical category.

See also PP attachment.