In grammar, a conjunction is a connective indeclinable particle serving to unite words, sentences, or clauses of a sentence, and indicating their relation to one another. They are classifiable into two main groups:
(1) Co-ordinating conjunctions, joining independent propositions, and subdivisible into copulative, disjunctive, adversative, and illative conjunctions;
(2) Subordinating conjunctions, linking a dependent or modifying clause to the principal sentence.
The only active influence which the conjunction can be said to exercise grammatically in a sentence is in respect of the mood of the verb following it in dependent sentences, the rule being to employ the subjunctive where futurity and contingency are implied, the indicative where they are not; as 'I will do it though he be there' (which he may or may not be); or 'I will do it, though he is there' (which he is). Research Conjunction
Abbreviations
General Information
Research Conjunction