gr. 2d, ex. 1: Don't do that!

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Change the statement to tell them *not* to do it, e.g., Grumio cantat. --> Grumio, noli cantare. Long marks: don't mark long vowels in this exercise. Word order: put the infinitive at the end of the sentence. You need 80% for credit on this, as usual (if you're doing this for credit).