Переведите предложения на российский язык, обращая внимание на времена группы Continuous

Переведите предложения на российский язык, обращая внимание на времена группы Continuous (Active и Passive).
1. We saw an accident while we were driving.
2. We are buying a new radio set soon.
3. Is anybody listening to the radio or can I turn it off ?
4. He wasnt attentive when the experiment was being carried out.
5.The professor is illustrating the largest achievements in machine-building industry.