sentence: He 's not only doing excellently as a student , but he 's known as one of the most popular students because he works voluntarily as a coach for the younger kids in his town .
modified: He 's not only doing excellently as a student however he 's been known as one of the popular students because he works voluntarily as a couch to the younger kids in his town .
transformation: PUNCT, OTHER, VERB:TENSE, ADV, NOUN, PREP