CONJUNCTION.
The Conjunction connects or joins together Sentences; so as out of two to make one Sentence.
Thus, “You, and I, and Peter, rode to London,” is one Sentence made up of these three by the Conjunction and twice employed; “You rode to London; I rode to London; Peter rode to London.” Again, “You and I rode to London, but Peter staid at home,” is one Sentence made up of three by the Conjunctions and and but: both of which equally connect the Sentences, but the latter expresses an Opposition in the Sense. The first is therefore called a Conjunction Copulative; the other a Conjunction Disjunctive.
The use of Copulative Conjunctions is to connect, or to continue, the Sentence, by expressing an addition, and; a supposition, or condition, if, as; a cause, because[41], then; a motive, that; an inference, therefore; &c.
The use of Disjunctives is to connect and to continue the Sentence; but to express Opposition of meaning in different degrees: as, or, but, than, altho’, unless, &c.