sentence: I do not agree with this statement because in big cities there are a lot of cars . If all the people in a city use their own car at the same time , there will be a huge traffic jam , so travelling by car is n't much more convenient in this situation .
modified: I 'm not agree abaout this statement becasue in a big cities there are a lot of cars , if all people in a city use his own car at the same time , there will be a huge traffic , so travelling by car is n't much more convenient in this situation .
transformation: CONTR, PREP, SPELL, DET, PUNCT, DET, DET, NOUN