sentence: Charles has to go to the war and Grace and her sons stay in that house , but they are not alone . They are with Bertha Mills , Mr Tuttle and Lydia .
modified: Charles has to go to the war and Grace and her sons stayed in that house but not they were not alone they were with Bertha Mills , Mr Tuttle and Lydia .
transformation: VERB:TENSE, PUNCT, ADV, VERB:TENSE, PUNCT, VERB:TENSE