sentence: If somebody wanted to play soccer , I would recommend that he or she has to do some stretching because soccer is a very active sport , so you always have a possibility to be injured .
modified: If somebody wanted to play a soccer , I would recommend that he or she has to have a stretching because soccer is very active sport so always has a possibility to be injured .
transformation: DET, VERB, DET, DET, PUNCT, PRON, VERB:SVA