sentence: So Peter went home to get his wallet , but before that he decided to take a nap because he was tired , so he started to sleep , but it ended up that he slept for over 3 hours and his mother started calling him on the telephone and she was really angry because he forgot to buy the magazines for his grandmother .
modified: So Peter went home to take his wallet but before that he decide to take a nap because he was tired so he started to sleep but it ended up that he slept for over 3 hours and his mother started calling him at the telephone and she was really angry because he forgot to buy the magazines for his grandmother .
transformation: VERB, PUNCT, VERB:TENSE, PUNCT, PUNCT, PREP