The Punctuation Guide

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Link: The Punctuation Guide

 

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...In the early years of written English, punctuation served to mark pauses and other aspects of speech when text was read aloud. Over the subsequent centuries, punctuation marks were refined, eventually being used to indicate grammatical relationships between parts of a sentence. Today, punctuation serves both purposes, though the grammatical function dominates.

 

This guide shows the current style of American punctuation. British punctuation is slightly different, as explained here...

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