3. Make the sentences negative.

Решение:

Для образования отрицательной формы Present Simple перед глаголом ставится вспомогательный глагол do или does с частицей not. Глагол после does not ставится в начальной форме. Используем do not (don't) для I, you, we, they и does not (doesn't) для he, she, it.

1. I eat pizza. → I do not eat pizza.
2. My brother studies German. → My brother does not study German.
3. We play computer games. → We do not play computer games.
4. Harry likes sport. → Harry does not like sport.
5. They drink water. → They do not drink water.

Ответ: I do not eat pizza; My brother does not study German; We do not play computer games; Harry does not like sport; They do not drink water.