1. We became good friends
2. The lesson began 10 minutes ago
3. He bit a piece of cake
4. A wind blew yesterday night
5. I broke the ceramic vase
6. They built a nice cottage
7. She burnt old letters
8. The boys played in the yard
9. Mum cooked many tasty things
10.1 finished this work​

1. We did not become good friends.

2. The lesson did not begin 10 minutes ago.

3. He did not bite a piece of cake.

4. A wind did not blow yesterday night.

5. I did not break the ceramic vase.

6. They did not build a nice cottage.

7. She did not burn old letters.

8. The boys did not play in the yard.

9. Mum did not cook many tasty things.

10. I did not finish this work.