Throughout my life, I was always taught not to use “gonna” in writing and double negatives in speech. The reasons were because they made me sound uneducated. The teachers never gave me an actual explanation as to why I shouldn’t use them. In middle school, there was one teacher that always responded with “can you?” whenever you asked her “can I go to the bathroom?”. She explained that “can I go to the bathroom?” is not grammatically correct and “may I go to the bathroom?” is the correct way to ask. The reason she gave is “can I go to the bathroom?” is questioning your ability to physically go to the bathroom while “may I go to the bathroom?” is asking for permission. I stopped saying “can I go to the bathroom?” from that day and while I don’t use the word “gonna” in writing, I do use it when speaking to friends and use double negatives.