sentence: But unfortunately , I have an exam on Thursday , so I ca n't meet you , but you can pick me up from the school at 1:30 , then we can go to have lunch .
modified: But unluckily , I 'm having an exam on Thursday so I ca n't meet you but you can take me from the school at 1:30 then we can go to have lunch .
transformation: ADV, VERB:TENSE, PUNCT, PUNCT, VERB, PART, PUNCT