Adjuncts, Disjuncts, and Conjuncts
Regardless of its position, an adverb is often neatly integrated into the flow of a sentence. When this is true, as it almost always is, the adverb is called an adjunct. (Notice the underlined adjuncts or adjunctive adverbs in the first two sentences of this paragraph.) When the adverb does not fit into the flow of the clause, it is called a disjunct or a conjunct and is often set off by a comma or set of commas. A disjunct frequently acts as a kind of evaluation of the rest of the sentence. Although it usually modifies the verb, we could say that it modifies the entire clause, too. Notice how "too" is a disjunct in the sentence immediately before this one; that same word can also serve as an adjunct adverbial modifier: It's too hot to play outside. Here are two more disjunctive adverbs:
• Frankly, Martha, I don't give a hoot.
• Fortunately, no one was hurt.
Conjuncts, on the other hand, serve a connector function within the flow of the text, signaling a transition between ideas.
• If they start smoking those awful cigars, then I'm not staying.
• We've told the landlord about this ceiling again and again, and yet he's done nothing to fix it.
At the extreme edge of this category, we have the purely conjunctive device known as the conjunctive adverb (often called the adverbial conjunction):
• Jose has spent years preparing for this event; nevertheless, he's the most nervous person here.
• I love this school; however, I don't think I can afford the tuition.

Authority for this section: A University Grammar of English by Randolph Quirk and Sidney Greenbaum. Longman Group: Essex, England. 1993. 126. Used with permission. Examples our own.