sentence: After that , the celebrations began and a lot of their friends came , each one presented a gift to Sara . She was really delighted and , suddenly , the doorbell been rang
modified: after that the celebration was began and a lot of their friends have attended each one presented a gift for Sara , she was very delighted and suddenly the doorbell been rang
transformation: ORTH, PUNCT, NOUN:NUM, VERB:TENSE, VERB:TENSE, VERB, PUNCT, PREP, PUNCT, ADV, PUNCT, PUNCT