отдаю все свои баллы,сделайте только 8 заданий​

1. The oil has just been changed.

2. He said the oil had already been changed

3. The oil was a changed yesterday.

4. The oil will be changed. I promise

5. I will change the oil. I promise

6. When was the oil changed?

7. We have to wait. The oil is being changed.

8. We had to wait. The oil was being changed.