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Punctuation: the comma and the apostrophe

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Three ways to end a sentenceMeet the CommaPunctuating a list
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Three ways to end a sentenceGet 3 of 4 questions to level up!
Meet the commaGet 3 of 4 questions to level up!
Punctuating listsGet 3 of 4 questions to level up!
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Salutations and valedictionsCommas in space and timeCommas and introductory elements
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Commas and introductory elementsGet 3 of 4 questions to level up!
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More uses for commasCommas in dialogueAppositivesBONUS: The Oxford comma
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AppositivesGet 3 of 4 questions to level up!
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Introduction to the apostropheIntroduction to contractionsApostrophes and plurals
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Meet the apostropheGet 3 of 4 questions to level up!
Introduction to contractionsGet 3 of 4 questions to level up!
Apostrophes and pluralsGet 3 of 4 questions to level up!
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Introduction to the possessivePossession for words ending in “s”Advanced (plural) possession
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Introduction to the possessiveGet 3 of 4 questions to level up!
Advanced (plural) possessionGet 3 of 4 questions to level up!
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Choosing between its and it’sBONUS: History of the apostropheBONUS: History of the possessive apostrophe
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Choosing between its and it'sGet 3 of 4 questions to level up!

About this unit

Commas are the superheroes of punctuation! They can perform many different functions. Apostrophes are most often used to stand in for missing letters or to show possession. In the rarest of cases, they can be used to form plurals. Let's learn more!