А— в одном из «настоящих» времен: present simple, present continuous или present perfect continuous; 1. my brother (work) at a research institute. he (work) there for five years since 1996. he (work) on his thesis now. he (work) on his thesis for a year. now he (make) his experiments at the laboratory. 2. professor m. (take) courses in english and american literature. he (know) six foreign languages. he (speak) and (read) four languages fluently. at present he (learn) japanese. he (learn) it for some months. 3. what you (do) here? — i (translate) an article about shakespeare's life. — i think you (translate) it for a long time. — yes, this article is rather long and difficult. i (translate) it for a few days. usually i (translate) from english into russian quite quickly. but as for this article i (work) on it since wednesday. 4. what you usually (do) in the evenings? i usually (do) my homework, (read), sometimes i (watch) television. now i (write) a report. i (work) on it for an hour and a half. 5. don't go out, it (rain) now. it (rain) since early morning. it often (rain) here in autumn. в — в одном из времен: past simple, past continuous, past perfect или past perfect continuous; 1. nick (write) a letter when i came. he (write) a letter for an hour when i entered. nick (not write) the letter yesterday and he (not write) it before i came. he just (finish) to write his letter. 2. kate (make) her report last week. and i (prepare) my report this week. i (make) my report when you entered the room. i (write) it for about an hour when you came. 3. it (rain) on saturday and it (rain) all day yesterday. and it (rain) this week too. it already (rain) for several hours when i went out, but it (stop) raining before you came. 4. who you (talk) to yesterday when i (meet) you in the street? i (talk) to my friend. he (come) from st. petersburg two days ago. we already (talk) for 15 minutes when you (see ) us. 5. ann (leave) the university, (take) a bus and (go) home. when she (arrive) home her son(prepare' his homework. he (work) for two hours when mother came. while ann (cook) supper her son (study) they (have) supper before they (go) to bed.

1. My brother works at a research Institute.He has worked there for five years since 1996. He is working on his thesis now. He has been working on his thesis for a year. Now he is making his experiments at the laboratory. 2. Professor M. takes courses in English and American Literature. He knows six foreign languages. He speaks and reads four languages fluently. At present he is learning Japanese. He has been learning it for some months. 3. What are you doing here? — I am translating an article about Shakespeare's life. — I think you have been translating  it for a long time. — Yes, this article is rather long and difficult. I have been translating it for a few days. Usually I translate from English into Russian quite quickly. But as for this article I have been working on it since Wednesday. 4. What do you usually do in the evenings? I usually do my homework,read,sometimes I watch television. Now I am writing a report. I have been working on it for an hour and a half. 5. Don't go out, it is raining now. It has been raining since early morning. It often rains here in autumn.
В
1. Nick was writing a letter when I came. He had been writting a letter for an hour when I entered. Nick did not write the letter yesterday and he had not been writting it before I came. He had just finished to write his letter. 2. Kate made her report last week. And I had prepared my report this week. I was making my report when you entered the room. I had been writing it for about an hour when you came. 3. It rained on Saturday and it was raining all day yesterday. And it had rained this week too. It had already been raining for several hours when I went out, but it had stopped raining before you came. 4. Who were you talking to yesterday when I met you in the street? I was talking to my friend. He came from St. Petersburg two days ago. We had already been talking for 15 minutes when you saw us. 5. Ann left the University,took a bus and went home. When she arrived home her son had prepared(was preparing) his homework. He had been working for two hours when mother came. While Ann was cooking supper her son was studying. They had had supper before they went to bed.