Conjunctions are words that connect clauses or sentences.
The commons coordinating conjunctions are: for, and, nor, but, or, yet, so. Remember the acronym FANBOYS. A coordinating conjunction is used to connect two independent clauses, it is often (but not always) accompanied by a comma.
The common subordinating conjunctions are: after, although, as, as if, as long as, because, before, even if, even though, if, if only, now that, once, rather than, since, so that, than, that, though, unless, until, when, whenever, where, whereas, wherever, while. A subordinating conjunction is used at the beginning of a dependent clause. It also establishes the relationship between the dependent clause and the rest of the sentence.
The common correlative conjunctions are: both . . . and, not only . . . but also, not . . . but, either . . . or, neither . . . nor, whether . . . or, as . . . as. They are used in pairs, joining various sentence elements that should be treated as grammatically equal.
Common conjunctive adverbs are: however, moreover, nevertheless, consequently, as a result. They are used to create complex relationships between ideas.