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The punctuation marks that signal the end of a sentence are the period, question mark and exclamation mark.
You use a period, by far the most common of the end punctuation marks, to terminate a sentence that makes a statement. You may also use periods with imperative sentences that have no sense of urgency or excitement attached:
When you want to express a sense of urgency or very strong emotion, end your imperative sentences and statements with an exclamation mark:
Exclamation marks are rare in formal writing, so use them sparingly, if at all.
Opt for a question mark at the end of a direct question:
Be careful not to use a question mark at the end of an indirect question. Indirect questions are simply statements, and therefore end with a period:
© Department of English, Faculty of Arts, University of Ottawa, 2024