When to use apostrophes - Laura McClure
Mastering Apostrophes in Plural Abbreviations: An English Guide
Apostrophes Numbers and Letters
18.5 What are the rules for apostrophes for the plural of abbreviations, numbers and letters?
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Do you use an apostrophe for plural last names?
Apostrophes are not needed for plural abbreviations
18.6 How can apostrophes help clarify an abbreviation?
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Apostrophes to Show Abbreviation (/Contraction) 1
Master the Apostrophe: Plural Lowercase Letters Made Easy
English Tutor Nick P Lesson (529) Common Mistakes with Plurals of Abbreviations
Contractions in English
DO YOU KNOW WHEN TO USE APOSTROPHES WITH CAPITAL ABBREVIATIONS? | Rules Explained
Acronyms with "S" or with "Apostrophe S"? Find the Difference
Apostrophe Rules | How to Use Apostrophes | English Writing Essentials
Using Apostrophes In English
Contractions: What are contractions? | English For Kids | Mind Blooming
Using Apostrophes
18.3 How can apostrophes be used in time expressions?