Feliz calurosa tarde de verano.
- I swim on mondays.
- Do you swim at the weekend?
- No, I don't swim very often.
- George swam the day before yesterday.
- Did you swim last night?
- No, I didn't swam a month ago.
-I've swum twice this month.
-Have you swum in my swimming pool?
-No, I haven't swum in your swimming pool.