Updated February 21, 2017 | Factmonster Staff
- Indicates a sudden break or abrupt change in continuity: ?If?if you'll just let me ex-plain?? the student stammered. And the problem?if there really is one?can then be solved.
- Sets apart an explanatory, a defining, or an emphatic phrase: Foods rich in protein?meat, fish, and eggs?should be eaten on a daily basis. More important than winning the election, is governing the nation. That is the test of a political party?the acid, final test.?Adlai E. Stevenson
- Sets apart parenthetical matter: Wolsey, for all his faults?and he had many?was a great statesman, a man of natural dignity with a generous temperament??Jasper Ridley
- Marks an unfinished sentence: ?But if my bus is late?? he began.
- Sets off a summarizing phrase or clause: The vital measure of a newspaper is not its size but its spirit?that is its responsibility to report the news fully, accurately, and fairly.?Arthur H. Sulzberger
- Sets off the name of an author or source, as at the end of a quotation: A poet can survive everything but a misprint.?Oscar Wilde
See also: The Dash and the Hyphen.