There arent some/are children in the garden?

There aren't any children in the garden. - В саду нет детей.

Are there any children in the garden?

Where aren't any children?

Who isn't there in the garden?

Are there any or on children in the garden?

Are there any children or boys in the garden?

Are there any children in the garden or in the yard?

There aren't any children in the garden, are there?

There are some children in the garden.

There are no children in the garden.

Some - используется в утвердительных предложениях.

Any - используется в отрицательных и вопросительных предложениях.