sentence: I pack my backpack , pick up my garbage bag and look around my room for one last time to make sure I have n't forgotten anything . I go downstairs and put the garbage bag into the trash bin .
modified: I pack my backpack , take my garbage bag and look around my room for one last time to make sure : I do n't forget anything . I go downstairs and put the garbage bag into the trash bin .
transformation: VERB, PUNCT, VERB:TENSE, VERB:FORM