1. How long (wait / she) for us?
2. How many times (I / tell) you?
3. How often (you / clean) the windows this year?
4. How many months (you/ take) piano lessons?
5. (you /ever / stay) in a castle?
6. Tom: Hi Ana. I (try) _______ to ring you several times today. Where (you / be)_______?
7. Ana: I (be) _________ at home all the time. But I (clean) _________ the house all day, so maybe I didn't hear the phone ring.
8. Tom: (you / clean) ___________ everything now?
9. Ana: No, not yet. I (tidy / not) ___________ up the kitchen yet. But why are you here?
10. Tom: Don't you remember? Jane (invite) ________ us to her birthday party and we (buy / not) _________ a present for her yet.
11. I (practise) ____________the piano for 30 minutes.
12. Bob (run) ____________for 10 km.
13. The children (be) _____________ on holiday for six days.
14. The dog (bark) _____________since midnight.
15. We (miss)_____________ the bus twice this week.