Colons in English usage include introducing lists, emphasizing points, and quoting.
Use a colon to introduce a list, quote, or example. For example, 'For lunch today, you may choose three of the following items: sandwich, yogurt, fruit cup, soup, or chocolate pudding.'
Capitalize the first letter following a colon for a proper noun or the beginning of a quote. An example is 'Patience, determination, ambition: These are the qualities of a successful student.'
A colon follows a complete sentence when introducing a list or quotation, offering an example or explanation, or emphasizing a point. An independent clause should precede the colon as in 'The students reached a conclusion at the end of the long meeting: they were tired and hungry but satisfied with the direction of their group project.'
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