salah satu contoh present continuous tense

1. (+) I am studying in my bedroom (-) I am not studying in my bedroom (?) Am i studying in my bedroom? 2. (+) Teresa is swimming right now (-) Teresa is not swimming right now (?) Is Teresa swimming right now? 3. (+) She is writing a letter to her father (-) She is not writing a letter to her father (?) Is she writing a letter to her father? 4. (+) My mother is cooking dinner in the kitchen (-) My mother is not cooking dinner in the kitchen (?) Is my mother cooking dinner in the kitchen? 5. (+) Tommy is listening to the radio at the moment (-) Tommy is not listening to the radio at the moment (?) Is Tommy listening to the radio at the moment?