sentence: If you do n't start studying before the exam at an appropriate time , you will only have enough time to know the broad outlines of the subject , but this will never help you soak up the details and understand the concepts lying behind every single word .
modified: If you do n't start studying before exam with an appropriate time , you will only have enough time to know the broad lines of the subject , but this will never help you soak the details and understand the concepts lying behind every single word .
transformation: DET, PREP, NOUN, PART