Скажите, что вы могли бы сделать летом, но не мог сделать в зимний период.
I could play on the beach in summer -I couldn't play on the beach in winter.
I could wear summer clothes in summer-I couldn't wear summer clothes in winter.
I could enjoy the green nature in summer-I couldn't wear summer clothes in winter.
I could sunbathe in summer-I couldn't sunbathe in winter.
I could wear a swimsuit in summer-I couldn't wear a swimsuit in winter.