Exclamation marks are used in exclamatory sentences, and sometimes in imperative sentences. Avoid using exclamation marks in formal writing as they are seen to concentrate on the emotion rather than the information. If you’re writing informally or creatively, an exclamation mark can be even more effective than words when implying tone.
1. Periods and trailing commas always go inside quotation marks and single quotes. 2. Be logical with question marks and quotes. 3. Capitalize the start of a direct quote, even in the middle of a sentence. 4. [Wikipedia Style Manual] If an entire sentence is quoted in such a way that it becomes a grammatical part of the larger sentence, the first letter loses its capitalization. 5. Use single quotes when quoting a quote. 6. Offset direct quotes with commas.