Definition.
295. A conjunction is a linking word, connecting words, word groups, sentences, or sentence groups.
Classes of conjunctions.
296. Conjunctions have two principal divisions:—
(1) Coördinate, joining words, word groups, etc., of the same rank.
(2) Subordinate, joining a subordinate or dependent clause to a principal or independent clause.
COÖRDINATE CONJUNCTIONS.
297. Coördinate conjunctions are of four kinds:
(1) COPULATIVE, coupling or uniting words and expressions in the same line of thought; as and, also, as well as, moreover, etc.
(2) ADVERSATIVE, connecting words and expressions that are opposite in thought; as but, yet, still, however, while, only, etc.