Английский, 7 класс, остальное на фото)

1. I'm going to Jamaica on Sunday.
Explanation: The preposition "on" is used to indicate a specific day in the future or past.

2. I've got an important meeting on Thursday afternoon.
Explanation: The preposition "on" is used to indicate a specific day of the week.

3. The bank is closed on Christmas day.
Explanation: The preposition "on" is used to indicate a specific day in the future or past.

4. We have lots of Christmas presents.
Explanation: The preposition "of" is used to indicate possession or quantity.

5. The film starts at 8 o'clock, so I'll pick you up at 7:30.
Explanation: The preposition "at" is used to indicate a specific time.

6. I'm busy at the moment. I'll call you back in a couple of minutes.
Explanation: The preposition "in" is used to indicate a period of time.

7. I was born on 29th March.
Explanation: The preposition "on" is used to indicate a specific date.

8. I met her in 1992.
Explanation: The preposition "in" is used to indicate a specific year.

9. Her birthday is on Saturday.
Explanation: The preposition "on" is used to indicate a specific day of the week.

10. He came two weeks ago.
Explanation: The preposition "in" is used to indicate a general time frame.

11. I don't like to go out at night.
Explanation: The preposition "at" is used to indicate a specific time of day.

12. The shops close at 6:30.
Explanation: The preposition "at" is used to indicate a specific time.

13. Are you free on the weekend?
Explanation: The preposition "on" is used to indicate a specific day or period of time.

14. He plays on Tuesdays.
Explanation: The preposition "on" is used to indicate a specific day of the week.

15. I'm in a hurry. Do it once!
Explanation: The preposition "in" is used to indicate a state or condition.

16. He wants to be a film star, but he's working in a hotel at present.
Explanation: The preposition "at" is used to indicate a specific time or location.

17. Can you come to lunch on Sunday?
Explanation: The preposition "on" is used to indicate a specific day of the week.

18. These birds sleep through the winter and wake up in the spring.
Explanation: The preposition "through" is used to indicate a period of time.

19. I've got an appointment at the dentist's at 12:30 tomorrow.
Explanation: The preposition "at" is used to indicate a specific time.

20. They're going on August 4th.
Explanation: The preposition "on" is used to indicate a specific date.

21. I'm sorry, I can't see you at the moment.
Explanation: The preposition "at" is used to indicate a specific time.

22. She'll be here at 3 o'clock.
Explanation: The preposition "at" is used to indicate a specific time.

23. Tell him to wait, I'll talk to him in a minute.
Explanation: The preposition "in" is used to indicate a period of time.

24. I work in a restaurant in the afternoon.
Explanation: The preposition "in" is used to indicate a specific time of day.

25. I study at night.
Explanation: The preposition "at" is used to indicate a specific time of day.

26. The train will arrive at 1:30.
Explanation: The preposition "at" is used to indicate a specific time.

27. The plane will arrive in 20 minutes' time.
Explanation: The preposition "in" is used to indicate a period of time.

28. I'm living in Zurich at the moment.
Explanation: The preposition "in" is used to indicate a specific location.

29. The restaurant is open from 3 o'clock in the afternoon until 11 o'clock at night.
Explanation: The prepositions "from" and "until" are used to indicate a time range.

30. I work Monday to Friday, but I'm off on the weekend.
Explanation: The preposition "on" is used to indicate a specific day of the week.

31. The hotel is open from February to October. It's closed in the winter.
Explanation: The prepositions "from" and "to" are used to indicate a time range.

32. I've got an exam at 9 o'clock on Monday morning.
Explanation: The prepositions "at" and "on" are used to indicate a specific time and day.

33. You're reading question 11 at the moment. A few seconds, you'll read question 12.
Explanation: The prepositions "at" and "in" are used to indicate a specific time and a period of time.

34. We're going on holiday next week. In a few days' time, we'll be on a beach.
Explanation: The prepositions "on" and "in" are used to indicate a specific time and a period of time.

35. Long hair was very popular in the 1970s.
Explanation: The preposition "in" is used to indicate a specific period of time.

36. We're having a party on Thursday. Can you come?
Explanation: The preposition "on" is used to indicate a specific day of the week.

37. I only work on Thursdays.
Explanation: The preposition "on" is used to indicate a specific day of the week.

First Conditional is used to talk about possible future actions or situations. It expresses a cause and effect relationship, where one event or condition will lead to another. The structure of the first conditional is "if + subject + present simple, subject + will + base verb".

Now let's go through each sentence and create a clear explanation for each one:

1. If Mary (come) to my house, we (play) football.
Explanation: If Mary comes to my house, it means that she is present and available. In this situation, the action of playing football will happen. The verb "come" is in the present simple tense, and the verb "play" follows the rule for the first conditional "will + base verb".

2. If Ann (not come) to my house, I (read) a book.
Explanation: If Ann doesn't come to my house, it means that she is not present or available. In this situation, the action of reading a book will happen. The negative form of the verb "come" is used here to indicate the absence of Ann. The verb "read" follows the rule for the first conditional "will + base verb".

3. If they (have) their holidays in summer, they (go) to the seaside.
Explanation: If they have their holidays in summer, it means that their holiday time aligns with the summer season. In this situation, the action of going to the seaside will happen. The verb "have" is in the present simple tense, and the verb "go" follows the rule for the first conditional "will + base verb".

4. If the fog (thicken), Harold (put up) the tent for the night.
Explanation: If the fog thickens, it means that the fog becomes denser or heavier. In this situation, the action of Harold putting up the tent for the night will happen. The verb "thicken" is in the present simple tense, and the verb "put up" follows the rule for the first conditional "will + base verb".

5. If Nick (finish) his work, he (go) to the theatre.
Explanation: If Nick finishes his work, it means that he completes his tasks or assignments. In this situation, the action of going to the theatre will happen. The verb "finish" is in the present simple tense, and the verb "go" follows the rule for the first conditional "will + base verb".

6. I (buy) this game if our father (give) me money.
Explanation: If our father gives me money, it means that he provides the necessary funds. In this situation, the action of me buying this game will happen. The verb "give" is in the present simple tense, and the verb "buy" follows the rule for the first conditional "will + base verb".

7. If we (come) to your place, you (show) us your present.
Explanation: If we come to your place, it means that we visit your location. In this situation, the action of you showing us your present will happen. The verb "come" is in the present simple tense, and the verb "show" follows the rule for the first conditional "will + base verb".

8. I (cook) for my friend if he (come) from the shop.
Explanation: If he comes from the shop, it means that he finishes his shopping. In this situation, the action of me cooking for him will happen. The verb "come" is in the present simple tense, and the verb "cook" follows the rule for the first conditional "will + base verb".

Remember, the first conditional is used to talk about possible future actions or situations that are dependent on a certain condition being met.