sentence: I took that decision because I was tired of trying to learn English and I did not have the level that I wanted , so when I heard about that opportunity , I said yes .
modified: I have taken that decision because I was tired to try to learn English and I did not have the level that I want , so when I heard about that ooportunity I said yes .
transformation: VERB:TENSE, PART, VERB:FORM, VERB:TENSE, SPELL, PUNCT