sentence: As an example , if a student needs to recuperate a subject or has to get a good mark , they ca n't go to do a sport because there is no time .
modified: AAs an example if a student need to recuperate a subject or have to take a good mark , they ca n't go to do a sport because there is no time .
transformation: SPELL, PUNCT, VERB:SVA, K, VERB:SVA, VERB