1. They have been training in the gym for two hours.
Общий: Have they been training in the gym for two hours?
Альтернативный: Have they been training in the gym for two or three hours?
Разделительный: They have been training in the gym for two hours, haven't they?
Специальный: Where have they been training for two hours?
К подлежащему: Who has been training in the gym for two hours?
2. He has participated in the city chess tournament this year.
Общий: Has he participated in the city chess tournament this year?
Альтернативный: Has he or his friend participated in the city chess tournament this year?
Разделительный: He has participated in the city chess tournament this year, hasn't he?
Специальный: What has he participated in this year?
К подлежащему: Who has participated in the city chess tournament this year?
3. My brother attended the tennis club last year.
Общий: Did my brother attend the tennis club last year?
Альтернативный: Did my brother attend the tennis club or the dance club last year?
Разделительный: My brother attended the tennis club last year, didn't he?
Специальный: When did m brother attend the tennis club?
К подлежащему: Who attended the tennis club last year?
4. They are watching the competition at the stadium now.
Общий: Are they watching the competition at the stadium now?
Альтернативный: Are they watching the competition or the concert at the stadium now?
Разделительный: They are watching the competition at the stadium now, aren't they?
Специальный: What are they watching at the stadium now?
К подлежащему: Who is watching the competition at the stadium now?
5. There are indoor and outdoor sports and games.
Общий: Are there indoor and outdoor sports and games?
Альтернативный: Are there indoor or outdoor sports and games?
Разделительный: There are indoor and outdoor sports and games, aren't there?
Специальный: What kind of sports and games are there?
К подлежащему: What is there? (грамматически такой вопрос возможен, но звучит он довольно бессмысленно)
6. You can go skiing in winter.
Общий: Can you go skiing in winter?
Альтернативный: Can go skiing or swimming in winter
Разделительный: You can go skiing in winter, can't you?
Специальный: When can go skiing?
К подлежащему: Who can go skiing in winter?
