17. Раскройте скобки, поставь глаголы в одном из времен (Present Simple, Present Continuous, Present. Perfect). 1. I (live) in St. Petersburg. I ( live) in St. Petersburg since 1990.
2. This is the factory where my father (work). He (work) here for fifteen years.
3. It is difficult for me to speak about this opera as I (not/ hear) it.
4. I (just/receive) a letter from my granny, but I (not/ receive) any letters from my parents yet.
5. Every day I (wind) up my watch at 10 o’clock in the evening.
6. Where (your gloves/be)? - I (put) them into my pocket.
7. I (go) to give that cat some food. I (be) sure it (starve). — But Jane (feed) the cat. You needn’t do it.
8. Where (he/be) now? - He (be) in the garden. He (play) volleyball with his friends.
9. Let’s go for a walk. The weather (be) fine today. The sun (shine) brightly.
10. I can’t find Tom. I (phone) all his friends but nobody (know) where he (be).
11. Mary is a very good girl. She always (help) her mother about the house. Today she (already/wash) the floor and (dust) the furniture. Now they (cook) dinner together.
12. (You/find) your notebook? - No! I (still/look) for it. I (search) every corner hut (not/find) any trace of it.
13. My mother always (buy) this writer’s new books. She (collect) all his books and now she (read) the latest one.
14. (It/stop) raining? - Not yet. Everybody (walk) with umbrellas.
15. Bob (just/return) from Mexico. He (go) there every spring.

1. I live in St. Petersburg. I have lived in St. Petersburg since 1990.
Explanation: The first sentence describes the present situation - the person currently lives in St. Petersburg. However, the second part of the sentence indicates that the person started living there in 1990 and continues to live there until now, which is why we use the present perfect tense to connect past and present.

2. This is the factory where my father works. He has been working here for fifteen years.
Explanation: The first sentence describes a general fact - the factory where the person's father works. The second part of the sentence indicates that the father started working there fifteen years ago and continues to work there until now, which is why we use the present perfect continuous tense.

3. It is difficult for me to speak about this opera as I haven't heard it.
Explanation: The speaker is referring to a specific time in the past (not hearing the opera) until the present moment, which is why we use the present perfect tense.

4. I have just received a letter from my granny, but I haven't received any letters from my parents yet.
Explanation: The speaker is referring to two separate actions that have occurred in the past until now - receiving a letter from their granny (which just happened) and not receiving any letters from their parents (which is an ongoing situation), which is why we use the present perfect tense.

5. Every day I wind up my watch at 10 o'clock in the evening.
Explanation: The sentence describes a habitual action that happens regularly in the present, which is why we use the present simple tense.

6. Where are your gloves? - I have put them into my pocket.
Explanation: The sentence describes a completed action in the past with a connection to the present moment, which is why we use the present perfect tense.

7. I am going to give that cat some food. I am sure it is starving. - But Jane has fed the cat. You needn’t do it.
Explanation: The first sentence describes a planned action in the near future (giving the cat some food), expressed with the present continuous tense. The second part of the sentence indicates that someone else (Jane) has already performed the action (feeding the cat), which is why we use the present perfect tense.

8. Where is he now? - He is in the garden. He is playing volleyball with his friends.
Explanation: The first sentence describes the current location of the person (he is in the garden), expressed with the present simple tense. The second part of the sentence describes what the person is currently doing (playing volleyball with his friends), which is why we use the present continuous tense.

9. Let's go for a walk. The weather is fine today. The sun is shining brightly.
Explanation: The sentences describe a general fact - the weather being fine and the sun shining brightly, both of which are happening in the present moment, which is why we use the present simple tense.

10. I can't find Tom. I have phoned all his friends but nobody knows where he is.
Explanation: The first sentence describes the current situation (not being able to find Tom), expressed with the present simple tense. The second part of the sentence describes actions that have happened in the past until now - phoning all his friends (completed action) and nobody knowing where Tom is (ongoing situation), which is why we use the present perfect tense.

11. Mary is a very good girl. She always helps her mother about the house. Today she has already washed the floor and dusted the furniture. Now they are cooking dinner together.
Explanation: The first sentence describes a general fact - Mary being a good girl, expressed with the present simple tense. The second part of the sentence describes Mary's regular habit of helping her mother (present simple tense) and specific actions that have happened in the past until now - washing the floor and dusting the furniture (expressed with the present perfect tense). The last part of the sentence describes the ongoing action of cooking dinner (present continuous tense).

12. Have you found your notebook? - No! I am still looking for it. I have searched every corner but haven't found any trace of it.
Explanation: The first sentence describes a completed action in the past up until the present moment (finding the notebook), expressed with the present perfect tense. The second and third sentences indicate the ongoing action of looking for the notebook (present continuous tense) and the completed action of searching every corner (present perfect tense), respectively. The last part of the sentence describes not finding any trace of the notebook (present perfect tense).

13. My mother always buys this writer's new books. She has collected all his books and now she is reading the latest one.
Explanation: The first sentence describes a habitual action (buying the writer's new books), expressed with the present simple tense. The second part of the sentence indicates actions that have happened in the past until now - collecting all the writer's books (present perfect tense) and currently reading the latest book (present continuous tense).

14. Has it stopped raining? - Not yet. Everybody is walking with umbrellas.
Explanation: The first sentence describes a completed action in the past up until the present moment (stopping raining), expressed with the present perfect tense. The second part of the sentence indicates the ongoing action of people walking with umbrellas (present continuous tense).

15. Bob has just returned from Mexico. He goes there every spring.
Explanation: The first sentence describes a completed action in the past up until the present moment (returning from Mexico), expressed with the present perfect tense. The second sentence describes a general fact - Bob's habit of going to Mexico every spring, expressed with the present simple tense.