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instead of the infinitives in brackets.
Note.
The Present Continuous expresses
an action going on at the
moment of speaking. The Present Perfect Continuous expresses an action
occupying a period of time still continuing or just finished.
1. What you (to look) at? — I (to look) at that picture over
there. I (to look) at it for almost half an hour and I still can’t
understand what it is. 2. What Mary (to do)? — She (to practise)
the piano. She (to play) since 12 o’clock. I think she must have a
rest. 3. Here you are at last! I (to look) for you everywhere.
4. Why you (to smile) Robert? — I (to watch) your kitten. What
a playful little thing it is! 5. I see you (to write)
letters all the
morning. Is it the last letter you (to write) now? 6. You (to sit)
here for a long time. You (to wait) for anybody? 7. How long you
(to study) English? — For three years already. 8. I (to work) at
my report since Monday. Now I (to write) the conclusion.
9. Mary’s mother (to rest) in the garden all day because she is ill.
10. She (to sleep) for ten hours! You must wake her! 11. David
(to repair) the TVset. He (to work) at it for an hour or so.
12. David (to wash) his hands. He just (to repair) the TVset.
13. Why you all (to laugh)? Jim (to tell) you his anecdotes?
14. It’s six o’clock. I (to wait) for Ann for half an hour. I must be
off now.
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