1. He usually rides his bike to school, but today he is walking. 2. My classmates are training for the school competition this month. 3. We don’t play ice hockey in summer. 4. Look! She is doing a handstand on the grass. 5. Every weekend they go cycling in the park.

1. He usually rides his bike to school, but today he is walking. — Обычно он ездит в школу на велосипеде, но сегодня идёт пешком. rides — Present Simple, is walking — Present Continuous.
2. My classmates are training for the school competition this month. — В этом месяце мои одноклассники тренируются для школьных соревнований. are training — Present Continuous.
3. We don’t play ice hockey in summer. — Летом мы не играем в хоккей на льду. don’t play — Present Simple.
4. Look! She is doing a handstand on the grass. — Посмотри! Она стоит на руках на траве. is doing — Present Continuous.
5. Every weekend they go cycling in the park. — Каждые выходные они катаются на велосипедах в парке. go — Present Simple.

Правило: Present Simple обозначает регулярные действия и общие факты; Present Continuous — действие, происходящее сейчас или в текущий период.