1.There are some cakes on the plate.
Are there any cakes on the plate?
There aren't any cakes on the plate./ There are no cakes on the plate.
2.There are some children in the yard.
Are there any children in the yard?
There aren't any children in the yard./ There are no children in the yard.
3.Someone knows how to solve the problem.
Does anyone know how to solve the problem?
No one knows how to solve the problem.
4. There is somebody new in the group.
Is there anybody new in the group?
There is nobody new in the group./
There isn't anybody new in the group.
5. I want to go somewhere this weekend.
Do I/you want to go anywhere this weekend?
I want to go nowhere this weekend./
I don't want to go anywhere this weekend.
6. Something strange happens in the department store.
Does anything strange happen in the department store?
Nothing strange happens in the department store.