Вот исправленные предложения:
I go to the gym when I have free time. (без ошибок)
She does not like to swim when it is cold. (исправлено "not likes" на "does not like")
They play football when it is sunny. (исправлено "plays" на "play")
He studies in the library when he has exams. (исправлено "study" на "studies")
We eat breakfast when we wake up. (исправлено "eats" на "eat")
Теперь все предложения грамматически корректны.
Вот исправленные предложения:
I go to the gym when I have free time. (без ошибок)
She does not like to swim when it is cold. (исправлено "not likes" на "does not like")
They play football when it is sunny. (исправлено "plays" на "play")
He studies in the library when he has exams. (исправлено "study" на "studies")
We eat breakfast when we wake up. (исправлено "eats" на "eat")
Теперь все предложения грамматически корректны.