Поставьте в отрицательный форму.
there is a coffee table in front of the armchair.
there is a cupboart next to the fridge.
there are some woman in the room.
there are some books on the shelves.
there is tree behind the house.

No there is not a coffee table in front of the armchair. No, there is not a cupboart next to the fridge. No, there are not some women in the room. No, there are not some books on the shelves. No, there is not tree behind the house. Можно использовать краткую форму: No, there is not , No, there are not.