Quais formas verbais que melhor completam as frases a seguir?
I. I _________ since 9 o’clock, but I _________ yet.
II. I _________ for such a long time. She must _________ to another town.
III. Susan_________ several cups of coffee already.
IV. They _________ chess for 5 hours.
V. How long _________ watching TV?