In feathered friend how does the setting contribute to the themes you export and questions one and two

1. I have been working on my project since yesterday .

2. We have been studying for last 7 hours.

3. He has been playing for an hour.

4. She has been waiting for several hours.

5. I have been searching for my books since morning .

6. They have been roaming around since morning.

7. Have you been doing your work for last 3 hours ?

8. My sister has been singing songs for last 2 hours .

9. Have you been roaming around since morning ?

10. I have not been out since morning .

Explanation: