I don't have time to answer all of them but here is 2-7. 2.became 3.held 4. it's either "him singing" or "his singing" 5.has 6. should have 7. walked
It's a redundant sentence because it does not need to say "over and over" and "and repeated it. Also those two phrases are double negatives. It could also be called a run on sentence.
I think you forgot to add the picture or letter thing
