What is the comma? Where is the comma used? Can comma be used to end a sentence as well?

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When do we use capital letters? How do we know if we have to sentence with a full stop, a question mark or an exclamation mark? When do we use a comma? When do we use a colon?

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When do we use a full stop and a comma? When do we use an exclamation mark? What is the colon? Where do we use it? When do we use an apostrophe? When do we use a hyphen? When do we use a dash? When do we use inverted commas?

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