13. дайте отрицательную и вопросительную форму предложений 4) there were a lot of famous people in the exhibition 5) there is something on the shelf 6) there will be somebody at that time

4) There were a lot of famous people in the exhibition.
There weren't many famous people in the exhibition.
Were there many famous people in the exhibition?
5) There is something on the shelf.
There isn't anything on the shelf.
Is there anything on the shelf.?
6) There will be somebody at that time.
There won't be anybody at that time.
Will there be anybody at that time?