Use a semicolon between independent clauses joined by a conjunctive adverb or a transitional phrase.
Spelling bees were her specialty; nevertheless, she failed to spell “urbiculture” correctly.
J. M. Barrie is most famous as the author of Peter Pan; however, I prefer his ghost story Farewell Miss Julie Logan.
They browsed carefully through reference; however, no clear answer appeared.
Heroes have fallen on hard times; for instance, the men of Dale.
Life is long; the work of a scholar, however, is never done.
The dream of the Black Knight is often seen as fundamental to Chaucer’s plan to console John of Gaunt; however, it can be usefully understood as a deepening characterization of the narrator. After all, the narrator is the one dreaming; doesn’t it make sense that the dream illustrate his needs?
Sentences in Green are incorrect.