sentence: So he went back to Sarah 's house and cleaned the whole bathroom , but Sarah already knew that he had left the bathroom like that , so before Michael entered the bathroom she said : " I know what you left there " and Michael went running to the bathroom .
modified: so he went back to Sarah 's house and clean all the bathroom , but Sarah already knew that he left the bathroom like this so before Michael entered to the bathroon she said : " I know what you leave there " and Michael went running to the bathroom .
transformation: ORTH, VERB:TENSE, OTHER, VERB:TENSE, OTHER, PREP, SPELL, VERB:TENSE