She doesn't have a dog.

- Does she have a dog? / У нее есть собака?

- No, she doesn't have a dog. She has a cat. / Нет, у нее нет собаки, но есть кот.

She doesn't have a brain.

She decide to cote for that douche because she doesn't have a brain. / Она решила проголосовать за то придурка, потому что у нее нет мозгов.

She has a good memory.

She's having her period.

She has brothers.

She's got brothers.