| Ему нравился большой рот Наташи. | He liked Natasha's large mouth. |
| Уголки её рта горестно опущены. | The corners of her mouth were turned down in sorrow. |
NB When the word рот functions as a subject and does not have a descriptive modifier, the construction рот у + Genitive is often preferred to (a) and (b): | |
| Рот у Наташи большой. | Natasha has a large mouth. |