There are also subordinate conjunctions, like "if" and "when", as in "I will play with you if you will lend me your marbles" and "I will lend you this book when you return the last one you borrowed".

Conjunctions may also be used to join nouns, adjectives, adverbs, verbs, phrases ...

Examples:

Conjunction is often abbreviated to CONJ.

CONJ is a lexical grammatical category.

See active arc. When an active arc is completed (when all its sub-constituents are found), the active arc becomes a constituent.

Constituents are used to create new active arcs - when there is a constituent X1 of type X, and a grammar rule whose right hand side starts with the grammar symbol X, then a new active arc of type X may be created, with the constituent X1 listed as a found constituent for the active arc (the only one, so far).

The components of a constituent, as recorded in the chart parsing algorithm described in lectures, are:

• 
  rules of the form a → b where a and b are strings of alphabet symbols, with the restriction that length(a) <= length(b)


• 
  rules of the form l X r → lbr where l, r, and b are (possibly empty) strings of alphabet symbols, and X is a non-terminal. l and r are referred to as the left and right context for X → b in the context-sensitive rule.

Context-sensitive grammars are more powerful than context-free grammars, but they are much harder to work with.

See also statistical NLP.