The following collection of activity sheets will help your students learn about double negatives, offering short sentences to correct. Answer keys are provided, but in some cases answers will vary. Since some words have a prefix that means “not,” students must be careful to say what they mean. For example, "His paper isn't illegible" can be correct if they are observing that it is easy to read, but is incorrect if they meant to use the word "legible."
Fun Fact: While two negatives make a positive in English, in French (and other languages), two negatives can be used to make a more emphatic negative.