sentence: I 'm writing to you to tell you that I am coming to your home next month . I hope that you are at home because I need your help . I want to buy a present for Mary and I do not know what her favourite colour is .
modified: I 'm writing to you to tell you that I will go to your home next month , I hope that you stay at home because I need your help , I will bought a present for Mary and I do not know what is her favourite coluor ,
transformation: VERB, PUNCT, VERB, PUNCT, VERB, VERB:FORM, OTHER, PUNCT