sentence: I bought shoes , clothes and a GPS watch . I told myself : now it is a challenge , I must defeat myself . The first day was so painful . I was tired to die when I only ran nearly 3 km , but things became better and better , and now I can run 10 km .
modified: I bought shoes , clothes and GPS watch , I told myself : now it is a challenge , I must defeat myself .The first day is so painful , I was tired to die when I just ran nearly 3 km , but things becomes better and better , and now I could run 10 km .
transformation: DET, PUNCT, ORTH, VERB:TENSE, PUNCT, K, ADV, VERB:TENSE, VERB:TENSE