sentence: My tea was brought out with a teapot and a small hourglass timer and I was supposed to wait 3 minutes before I poured the tea .
modified: My tea was brought out with teapot and a small hourglass timer where I am supposed to wait 3 minutes before I should pour the tea .
transformation: DET, OTHER, VERB:TENSE, VERB:TENSE, VERB:TENSE