задайте общий вопрос к предложениям и сделайте их отрицательными He visits his uncle very often. Tom is surfing the Net at the moment.

Общий вопрос: Does he visit his uncle very often?

Отрицательная форма: He does not visit his uncle very often.

Общий вопрос: Is Tom surfing the Net at the moment?

Отрицательная форма: Tom is not surfing the Net at the moment.