-Double negatives
-Adding an apostrophe for the posessive form of "it"
-Placing the comma outside of the quotation marks of a phrase when the subject is at the end of the sentence (i.e., "The cat's downstairs", said Martha, instead of the correct way: "The cat's downwstairs," said Martha)
-Adding an apostrophe for the posessive form of "it"
-Placing the comma outside of the quotation marks of a phrase when the subject is at the end of the sentence (i.e., "The cat's downstairs", said Martha, instead of the correct way: "The cat's downwstairs," said Martha)

