sentence: People do not need to carry a lot of books in a bag . Pupil can not say that he forgot a book because he has all his books on his tablet computer .
modified: People do not need to carry a lot of books in a bag .Pupil could not say that he left a book because he has all books in his tablet computers
transformation: ORTH, VERB:TENSE, VERB, DET, PREP, NOUN:NUM, PUNCT