Conjunctive adverbs are adverbs which join two clauses; some examples of are also, besides, accordingly, finally, subsequently, therefore, thus, meanwhile, moreover, nonetheless, instead, however, indeed, hence, consequently, similarly and still. Conjunctive adverbs frequently (but not necessarily) have a semi-colon before them. As they’re conjunctions (i.e. words that join two thoughts or ideas), it’s best not to use them at the beginning of a sentence.
Please close the outer door; otherwise, the cold air comes in.
First feed the horses; next, please feed the chickens.
Conjunctive adverbs can also put a little break in the sentence, providing emphasis.
The new building will, furthermore, provide storage facilities as well as meeting space.
The commas are used around the conjunctive adverb for emphasis. If the interruption in the sentence should be weaker, just leave out the commas.
The new building will furthermore provide storage facilities as well as meeting space.