In conclusion, let me observe that while there are numerous cases where a double negative conveys a positive, there is no case where a double positive conveys a negative. It seems to be an easy way to get one. As a speech therapist a number of years ago evaluating the articulation of children, I gave an articulation test to all of the incoming kindergartners. I gave the same test over and over and in response to the pictures shown them, children said the word. From one school that teaches our children Just between you and I case is important.
Verbs has to agree with their subjects.
Don't use no double negatives. When one is writing, it is important to maintain your point of view. Proofread your work. Watch out for irregular verbs which have croped into the language. Don't say the same thing more than once.