Questions & Answers about Летом мне нравится свежий воздух в парке.
Летом is the instrumental case of лето (summer) used in a time expression meaning “in summer / during summer”.
Russian often uses the bare instrumental case to talk about when something happens:
- зимой – in winter
- осенью – in autumn
- ночью – at night
So:
- Летом мне нравится… = In summer I like…
You do not say в летом or в лето in this meaning. That would be ungrammatical here.
The verb нравиться works differently from English to like:
- The thing liked is the subject.
- The person who likes it is in the dative case.
So:
- Мне нравится свежий воздух.
Literally: To me the fresh air is pleasing.
Here:
- мне = to me (dative of я)
- свежий воздух = subject of нравится
Я нравлюсь means I am liked (by someone), not I like.