1. He has learned to swim since last week.

2. Because I didn't have many class yesterday, I played sports.

3. Although being short, she still plays soccer.

4. This is the first time I have been to Da Lat.

5. For me, football is the most interesting sport. 

1. She began to learn to swim last week.

→ She has started learning to swim last week

2. I didn't have any class yesterday, so I played sports.

→ Because I play sports, I didn't have class yesterday

3. She is short, but she still plays basketball.

→ Although she's short, she still plays basketball.

4. I have never been to Da Lat before.

-> This is the first time I have ever been to Sa Pa.

5. For me, no kinds of sports are more interesting than football.

→ For me, football is the most interesting sport.