Найдите и исправьте ошибки, если таковые имеются (обратите внимание на использование времен года) Find and correct the mistakes if any (pay attention to the use of tenses) .
1.After graduating from the institute I came to St. Petersburg. I am working here since then. 2. I have just left the house when you phoned me. 3. By the time I came to the country cottage my friends have already left. 4.When I came, my friend was sitting on the sofa and was reading a newspaper. 5. It has rained since morning and I am afraid, it won't stop by Saturday. 6 .He will work at his new book during his holyday. 7. The women who speaks with my sister is my neighbor who is living opposite us. 8. They were looking for the money since working but they couldn't find it anywhere. 9.Yesterday when I came to see my friend he was having supper. He has just come home. 10 .After he has finished the picture he will invite his friends to look at it.

1. After graduating from the institute, I came to St. Petersburg. I have been working here since then.
Explanation: The present perfect continuous tense is used here (have been working) to show an action that started in the past and is still happening at the present moment.

2. I had just left the house when you phoned me.
Explanation: The past perfect tense (had left) is used here to show an action that happened before another past action (when you phoned me).

3. By the time I came to the country cottage, my friends had already left.
Explanation: The past perfect tense (had already left) is used here to show an action that happened before another past action (when I came to the cottage).

4. When I came, my friend was sitting on the sofa and reading a newspaper.
Explanation: The past continuous tense (was sitting, was reading) is used here to show ongoing actions that were happening at a specific past time.

5. It has been raining since morning, and I am afraid it won't stop by Saturday.
Explanation: The present perfect continuous tense (has been raining) is used here to show an action that started in the past and is still happening at the present moment.

6. He will work on his new book during his holiday.
Explanation: The future simple tense (will work) is used here to show a future action.

7. The woman who is speaking with my sister is our neighbor who lives opposite us.
Explanation: The present continuous tense (is speaking, lives) is used here for actions happening at the present moment.

8. They had been looking for the money since they started working but they couldn't find it anywhere.
Explanation: The past perfect continuous tense (had been looking) is used here to show an action that started in the past, continued for a period of time, and was still ongoing at a specific past time.

9. Yesterday when I went to see my friend, he was having supper. He had just come home.
Explanation: The past continuous tense (was having) is used here to show an ongoing action at a specific past time. The past perfect tense (had come) is used here to show an action that happened before another past action (when I went to see my friend).

10. After he finishes the picture, he will invite his friends to look at it.
Explanation: The future simple tense (will invite, finishes) is used here to show future actions.