Ex. use the present continuous or the present perfect continuous tenses instead of the infinitives in brackets: 1.she (to live) in that house round the corner about 20 years. 2.you (to play) too long. you must do your lessons now. 3. what you (to look (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. 4.what angela (to (to practice ) the piano. she (to play) since 12 o’clock . i think she must have a rest. 5.here you are at last! i (to look) for you everywhere. 6.why you (to slime) robert? - i (to watch) your kitten. what a playful little thing it is! 7 i see you (to write) letters since morning. it is the last letter you (to write) now? 8.you (to sit ) here for a long time . you (to wait) for anybody? 9. david (to repair) the tv set. he (to work ) at it for an hour or so . 10.i (to work) at my report since monday .now i (to write) the conclusion.

1. She has been living in that house round the corner about 20 years.
2. You are playing too long. You must do your lessons now.
3. What are you looking at? - I am looking at that picture over there. I have been looking at it for almost half an hour and I still can’t understand what it is.
4. What is Angela doing? - She is practicing the piano. She has been playing since 12 o’clock. I think she must have a rest.
5. Here you are at last! I have been looking for you everywhere.
6. Why are you smiling, Robert? - I am watching your kitten. What a playful little thing it is!
7. I see you have been writing letters since morning. It is the last letter you are writing now?
8. You have been sitting here for a long time. Are you waiting for anybody?
9. David is repairing the tv set. He has been working at it for an hour or so.
10. I have been working at my report since Monday. Now I am writing the conclusion.