Present Simple, Present Continuous, Present Perfect, Present Perfect Continuous.
1. This man (is) a writer. He (writes) books. He (has been writing) books
since he was a young man. He has already ( written) eight books. 2. What have you
(been doing) here since morning? 3. Lena is a very good girl. She always (
helps) her mother about the house. Today she (has been helping) her mother since
morning. They have already ( washed) the floor and ( dusted) the furniture.
Now they (are cooking) dinner together. 4. He (is running) now. He (has been running) for
ten minutes without any rest. 5. What are they ( doing) now? — They (are working)
in the reading room. They have (been working) there for three hours already. 6.
Where is he now? — He (is) in the garden. He (is
playing) volleyball with his friends. They (have been playing) since breakfast time.
7. I ( live) in St. Petersburg. I (have lived) in St. Petersburg since
1990. 8. This is the factory where my father ( works). He (has worked)
here for fifteen years. 9. Have you ( found) your notebook? — No! I am still
( looking) for it. I have already (been looingk) for it for two hours, but (have not yet found) it. 10. You (have been playing) with a ball for three hours already. Go
home and do your homework. 11. Wake up! You (have been sleeping) for ten hours already.
12. I (have been waiting) for a letter from my cousin for a month already, but
(have not yet received) it. 13. She has already been doing her homework for two
hours; but she has (not yet done) half of it. 14.1 (have been waiting) for you since
two o'clock. 15. What are you ( doing)? — I (am reading). I (have been reading) for two
hours already. I have already (read) sixty pages. 16. It is difficult for
me to speak about this opera as I (have not heard) it. 17. I have just
received a letter from my granny, but I have (not yet received) any letters
from my parents. 18. The weather (is) fine today. The sun (has been shining)
ever since we got up. 19. Every day I ( wind) up my watch at 10
o'clock in the evening. 20. Come along, Henry, what are you ( doing) now? I
(have been waiting) for you a long time. 21. Where are your gloves ? — I (have
put) them into my pocket. 22. I (am staying) with some American friends in
Chicago. I (have been staying) with them for two weeks now. I ( have had) a great
time here. I (have been taking) the opportunity to improve my English. I have already
( seen) the towering skyscrapers of Chicago which are reflected in
the rippling water of Lake Michigan. I have just ( taken) a picture of
Chicago's Sears Tower which (rises) 1,707 feet and ( provides) a
panoramic view from the skydeck. 23. I (am going) to give that cat some
food. I (am) sure it (is starving). — But Jane has already ( fed) the
cat. You needn't do it.