1.present perfect
she hasn't bought a new pair of shoes.
2.present Simple
She doesn't buy a pair of shoes every year.
3.past Simple
She didn't buy that pair of shoes last month.
4 Simple future
She won't buy brown shoes tomorrow.
5 present Continuous
Look! She isn't buying shoes right now.
Объяснение:
положительная форма написана в вопросе,поэтому дала только отрицательную.