A conjunctive adverb is an adverb

Adverb

An adverb is a part of speech that modifies verbs or any part of speech other than a noun . Adverbs can modify verbs, adjectives , clauses, sentences, and other adverbs....

 that connects two clauses. Conjunctive adverbs show cause and effect, sequence, contrast, comparison, or other relationships.

Common conjunctive adverbs

• accordingly
• additionally
• also
• anyway
• again
• as a result
• besides
• certainly
• comparatively
• consequently
• contrarily
• conversely
• finally
• further
• furthermore
• elsewhere
• equally
• hence
• henceforth
• however
• just as
• in addition
• in comparison
• in contrast
• in fact
• incidentally
• indeed
• instead
• likewise
• meanwhile
• moreover
• namely
• nevertheless
• next
• nonetheless
• notably
• now
• otherwise
• rather
• similarly

• subsequently
• still
• that is
• then
• thereafter
• therefore
• thus
• undoubtedly
• uniquely

Punctuation

The following rules are considered to be correct punctuation for conjunctive adverbs:

• Use a semicolon or period before the conjunctive adverb to separate two independent clause
  Independent clause
  An independent clause is a clause that can stand by itself, also known as a simple sentence. An independent clause contains a subject and a predicate; it makes sense by itself....
  
  s joined by a conjunctive adverb. A conjunctive adverb is not strong enough to join two independent clauses without the aid of a semicolon.
• Use a comma following the conjunctive adverb when it appears at the beginning of the second clause unless the adverb is one syllable.

Like other adverbs, conjunctive adverbs may move around in the clause (or sentence) in which they appear. When they appear at the end of the clause, they are preceded by a comma. If they appear in the middle of the clause, they are normally enclosed in commas, though this rule is not absolute and is not always applied to very short clauses.

Examples

Independent clauses:

• He can leap tall buildings in a single bound; furthermore, Dwight Schrute is a hog.
• He can leap tall buildings in a single bound. Furthermore, Dwight Schrute is a hog.

• Bret enjoys video games; therefore, he is a crazy nerd.
• Bret enjoys video games. He is a crazy nerd.

• He went to the store; however, he did not buy anything.
• He went to the store. He did not buy anything.

• Stephanie lent me a barrel of pickled plums; consequently, she is my friend.
• Stephanie lent me a barrel of pickled plums. She is consequently my friend.

• I sat down alongside Adam; henceforth, he sang.

• Elaine wanted to high-five the friendly giant; consequently, she had to jump to reach him.