sentence: Because , when we decide to go shopping and we have an idea what we want to buy and it appears that we ca n't find what we want , we are disappointed and frustrated .
modified: Because , when we decided to go for a shopping and have an idea what we want to buy and it appears that we ca n't find what we want , we are disappointed and frustrated .
transformation: VERB:TENSE, PREP, DET, PRON