Could you correct my sentences if I'm wrong.
1. What is his favoite sport?
그가 좋아하는 운동은 무엇입니까?
2. Why did his father teach him how to play tennis?
왜 그의 아빠는 그에게 테니스를 가르쳤습니까?
3. Who did he get tennis lessens from?
그는 누구에게 테니스 레슨을 받았습니까?
4. How many times a week does he play tennis?
일주일에 몇번 그는 테니시를 칩니까?
5. How many set a day does he play tennis?
그는 하루에 몇 세트나 테니스를 칩니까?
It's about three or four set.
3-4 세트
6. What does he think the great way to keep in shape?
그는 몸매를 유지하는 가장 좋은 방법이 무엇이라고 생각합니까?
7. Could tell me two reasons for this why he love playing tennis?
그는 왜 테니스 치는 것을 즐기는 지 2가지 이유를 말해주세요.
8. How can he always enjoy playing tennis with his friends?
어떻게 그는 그의 친구들과 테니스 치는 것을 즐깁니까?
9. They all share the love toward the sport. so they always enjoy each other's
company.
그들은 운동에 대한 사랑을 공유하다보니 함께 시간을 보내는 것이 즐겁기만하다.
10. When did he begin playing tennis?
언제 그는 테니스를 치기 시작했습니까?
I made some minor changes - #6 is phrased in an awkward way. "what does he think is a good way to keep in shape". I also changes #7 to "Could you tell me 2 reasons he love's playing tennis?"
Question 8 confused me - are you asking WHY he enjoys playing tennis with his friends or are you expressing surprise that he enjoys it? "How can you talk to me like that?" is a rhetorical question expressing disbelief for example.