Haha, I'm still confused by these words, even THOUGH I learn English for 3 years. My younger sister studies punctuation worksheets, but literally, every sentence has one of these words, lol. By the way, why you wrote it here? The guy asked about his trombone/trumpet chorus/melody... However, the video is private for some reason, so unlikely someone will help him. Also, as I see, the thread is from 2019, so I don't think he needs advice now 
(but who knows?) I just hope he is doing good in 2021 to cope without proofreading.
(but who knows?) I just hope he is doing good in 2021 to cope without proofreading.