Ten perfect sentences about sports

1. I like sports.
2. I began to swim at five years old.
3. I was always playing basketball after school when I was in China.
4. I've never played baseball since I was a child.
5. I had seen someone playing American football before I came to America.
6. Now I am trying to exercise indoors.
7. I will climb the mountain next month.
8. I was running for 3 hours one time when I was young.
9. I am going to play football next week.
10. I was skating with my friends on smowy day last week!