Задать все 5 типов вопросов:

1) The smiths have been driving to the country for two hours

2) They are going to throw a great party next week

Have the Smiths been driving to the country for two hours?

The Smiths have been driving to the country for two hours, haven't they?

How long have the Smiths been driving to the country?

Have the Smiths been driving to the country for two or three hours?

Who has been driving to the country for two hours?

Are they going to throw a great party next week?

They are going to throw a great party next week, aren't they?

Who is going to throw a great party next week?

When are they going to throw a great party?

Are they going to throw a great party next week or tomorrow?