Su oracion esta gramaticamente correcta
I would just google all of these
<span>In order to command someone to do something (or in this case, not to do something), you need to use the imperative form of a verb. In Spanish, the affirmative and the negative form of imperatives are different, and you need to learn the rules as to how to form them. However, here are my answers: 1. No hables! = Don't speak! You have the verb hablar, and when you conjugate it into its imperative form, it will be no hables. 2. No respires! = Don't breathe! 3. No leas! = Don't read!</span>
I have eaten should be correct, if its wrong its I ate.
