как верно написать предложение в множественном числе. 1. I am an

1. I am an actress. We are actresses.
2. Her aunt is from Australia. Her aunts are from Australia.
3. He is a postman. They are postmen.
4. It is a shake. They are shakes.
5. My sister is a worker. My sisters are workers.
6. It is a dragon-fly. They are dragon-flies.
7. Her nephew is from Japan. Her nephews are from Japan.
8. I am from France. We are from France.
9. His brother is a sailor. His brothers are sailors.
10. Our son is a good student. Our sons are good students.