Utiliza la forma to be + not en las oraciones negativas.

1. Tom (be) very happy because he won the race.

2. (be)  the cookies in the oven ready to eat?

3. Sara (be) a teacher at the local school, and she loves her job.

4. Emma (not / be) tired after the long walk.

5. Anna and Jake (not / be) siblings; they (be) cousins who see each other during the holidays.

6. David and Lily (be) good friends; they play soccer together every Saturday.

7. The flowers (be) beautiful in the garden, and they attract many butterflies.

8. Liam and Emma (not / be) at the party.

9. (be) David and Lily friends who play soccer together?

10.The museum (be) interesting; it has many exhibits about art.

11. Jack (not / be) a painter; he is a musician who plays the guitar.

12. I (be) happy. I (not / be) sad.

13. (be) the cat scared of the loud thunder?