помогите найти глагол сказуемое и определить видовременную форму

1. All historical places of London are in the West End.

2. I have not seen Bill for a long time.

3. Can you hear a bird singing?

4. Many different languages are spoken in Europe.

5. She has been studying in the library for hours.

6. There were so many cars in the street that we could not find a parking