Apostrophe

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Tips: A good time to proofread is when you have finished writing the paper. Try the following strategies to proofread for apostrophes:
 * If you tend to leave out apostrophes, check every word that ends in -s or -es to see if it needs an apostrophe.
 * If you put in too many apostrophes, check every apostrophe to see if you can justify it with a rule for using apostrophes.