sentence: In addition , for the last three years , I have been a volunteer at my tennis club , where I have developed different skills to organize activities , sports games and competitions for children from 6 to 14 years old .
modified: In addition , the last three years I have been as voluntary in my tennis club , where I have developed different skills to organize activities , sports games and competitions for children from 6 to 14 years old .
transformation: PREP, PUNCT, OTHER, MORPH, PREP