Слова для помощи: back hurts, ,hot,tired,no money.Предложения нужно поставить в Present Perfect Continious Example:His back hurts because he's been worling in the garden.
2 They are tired because they have been playing tennis for three hours. 3 He feels hot because he has been running for an hour. 4 They have no money because they have been buying things /have been doing the shopping for two hours.