Поставьте предложения в вопросительную и отрицательную формы.1. The price of goods

1
Will the price of goods certainly depend on the terms of delivery?
The price of goods won't certainly depend on the terms of delivery.
2
Are there insurance policies and insurance certificates among insurance documents?
Among insurance documents there aren't insurance policies and insurance certificates,
3
Have there been changes in Russia's trading partnership?
There haven't been changes in Russia's trading partnership.