Write sentences use the present perfect continuos of verb in brackets, the underlined time expression and for or since?

1. - I've been reading this book for a week.

2. - We've been having dinner since 8 o'clock.

3. - My brother has been living in America since January.

4. - I've been doing my homework for three hours.

5. - She's been waiting for two hours.

6. - My dad has been working in the bank since 2007.

7. - We've been taking the bus to school for three years.

8. - They've been practising the guitar for five years.

9. - I've been playing the piano since I was four.

Las oraciones con presente perfecto continuo se forman de la siguiente manera : utilizando el presente perfecto del "verbo to be" y el participio presente del verbo.

Sujeto + has / have been + verbo(ing).