The differences are explained in great detail, with examples, at
I confess I have not read it all, and would probably not remember the diffrent definitions if I did. Perhaps one of our English experts can give a more concise definition.
Coordinating conjunctions (FANBOYS) join equal things -- that is, are used to join two independent clauses (making a compound sentence), to join two subjects (making a compound subject), etc. Correlative conjunctions do about the same thing as coordinating conjunctions, but they always appear in pairs.
Subordinating conjunctions are used to join two unequal things -- that is, an independent clause with a dependent clause or an independent clause with a phrase.
There's a good section at the beginning of this webpage explaining the coordinating conjunctions and what each is used for. Subordinating conjunctions are after that, and the section on correlative conjunctions is near the bottom.
subordinating conjunction =
the subordination that occurs when a conjunction makes one linguistic unit a constituent of another
a conjunction (like `since' or `that' or `who') that introduces a dependent clause
correlative conjunction =
In grammar, a conjunction is a part of speech that connects two words, phrases or clauses together
coordinating conjunction =
the coordination by conjunction of linguistic units of the same status
a conjunction (like `and' or `or') that connects two identically constructed grammatical constituents.
In grammar, a conjunction is a part of speech that connects two words, phrases or clauses together. This definition may overlap with that of other parts of speech, so what constitutes a "conjunction"
a____ often follow an action verb
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