1. Who is playing basketball at the moment? Is Jason palying basketball at the moment?Jason is playing basketball at the moment, isn't he? Is Jason plying basketball or tennis at the moment?
2. What do we write every week? We write tests every week, don't we? Do we write grammar tests every week? Do we write tests or compositions every week?
3. Who gets up at seven o'clock every morning? Every morning my mother gets up at seven o'clock, doesn't she? Does my mother get up at seven o'clock every morning? Does my mother get up at seven or eight o'clock every morning?
4. Is the sun shining brightly now? The sun is shining brightly, isn't it? Is the sun or moon shining brightly? What is shining brightly now?