sentence: He went back home to get ready for school and he tried to forget what he had seen , but he could n't .
modified: He 's back home for getting ready for school when he 's try to forget what he saw , but he ca n't .
transformation: CONTR, PART, VERB:FORM, OTHER, CONTR, VERB:TENSE, VERB:TENSE, VERB:TENSE