Вот предложения в отрицательной форме:
1. I haven't charged my phone.
2. Sergey hasn't forgotten his password.
3. Wanda hasn't broken her watch.
4. We haven't bought a new computer.
5. They haven't turned on the TV.
6. I haven't asked for more information.
Объяснение: Чтобы образовать отрицательную форму в Present Perfect, мы добавляем 'not' после 'have' или 'has'. Сокращенная форма: haven't, hasn't.