Задайте вопрос к подлежащему.
1. The children are playing football.
    ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, football?
2. The children play football.
    ........................ football?
3. The children played football.
    ........................... football?
4. The children were in the swimming pool.
    ........................  in the swimming pool?
5. The children have got a lot of pencils.
    ................................ many pencils?
6. The children are on holidays.
    ......................  on holidays?