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A compound sentence has at least two independent clauses that have related ideas. Conjunctions have one job, to connect. They join words, phrases, or clauses together to clarify what the writer is saying. Their presence provides smooth transitions from one idea to another.
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A conjunctive adverb can join two main clauses. In this situation, the conjunctive adverb behaves like a coordinating conjunction, connecting two complete ideas. Notice, however, that you need a semicolon, not a comma, to connect the two clauses:
Choose the appropriate conjunctive adverb:
otherwise moreover then
The dark skies and distant thunder dissuaded Mary from her early morning run; __, she had twenty essays to correct for her afternoon class.
Karen’s apartment complex does not allow dogs over 13Kg; __, she would have bought the gangly Great Dane puppy playing in the pet store window.
The cat ate a bowlful of tuna; __, to the squirrels’ delight, the fat feline fell asleep in the rocking chair.