1. Divide constructions into two parts. Write out the numbers of the
sentences in Passive Voice and in Causative Constructions.(можно писать
только номера предложений)
1. We had our house repaired last summer. 2. The roof was repaired and the windows!
were replaced. 3. We had the floors painted. 4. We had walls wallpapered. 5. An alarm
system was installed. 6. We had all rooms redecorated. 7. Next summer we will have
the garden tided up. 8. Some new fruit trees will be planted. 9. A new shed will be built.
10. We will have the fence restored and painted. 11. We will have old trees neatly
trimmed. 12. Flowers will be bought in the nearest market. 13. We have the
environment changed every year. 14. A lot of changes are done. 15. A lot of morey is
spent. 16. A lot of materials are used. 17. We have new benches designed. 18. Some
workers are hired every summer. 19. We have many changes done.

1. Passive Voice: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 15, 16, 17, 18
Causative Constructions: 14, 19

Explanation:
In the given set of sentences, Passive Voice is used when the subject receives the action of the verb. In Passive Voice, the object of the active sentence becomes the subject, and the subject of the active sentence becomes the agent (or is sometimes omitted).

On the other hand, Causative Constructions are used when someone makes another person do something. It implies that someone causes an action to happen, rather than doing the action themselves. The causative verbs used are "have" and "will have" in this particular set of sentences.

Now let's analyze each sentence individually to categorize them correctly.

1. We had our house repaired last summer. (Passive Voice)
2. The roof was repaired and the windows were replaced. (Passive Voice)
3. We had the floors painted. (Passive Voice)
4. We had walls wallpapered. (Passive Voice)
5. An alarm system was installed. (Passive Voice)
6. We had all rooms redecorated. (Passive Voice)
7. Next summer we will have the garden tidied up. (Passive Voice)
8. Some new fruit trees will be planted. (Passive Voice)
9. A new shed will be built. (Passive Voice)
10. We will have the fence restored and painted. (Passive Voice)
11. We will have old trees neatly trimmed. (Passive Voice)
12. Flowers will be bought in the nearest market. (Passive Voice)
13. We have the environment changed every year. (Passive Voice)
14. A lot of changes are done. (Causative Construction)
15. A lot of money is spent. (Passive Voice)
16. A lot of materials are used. (Passive Voice)
17. We have new benches designed. (Passive Voice)
18. Some workers are hired every summer. (Passive Voice)
19. We have many changes done. (Causative Construction)

By analyzing each sentence, we can classify them as follows:
- Passive Voice: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 15, 16, 17, 18
- Causative Constructions: 14, 19