以下文章每行都可能有一處錯誤，請幫忙改正

(1)My favourite hobby is swimming. I start swimming
(2)in P.2.I have swum for 4 years.I usually go swimming
(3)every weeks with my parents. Sometimes I go swimming
with my friends after school.

(4)I can swim for 20 minutes without stopping.I am good at
(5)backstroke style.Wearing a swimming cap can make me
(6)swim faster than without wearing a swimming cap .

(7)Swimming is a good exercise. It is good for my health.
(8)moreover, the weather in Hong Kong is suitable for
(9)swimming most of the time. So I can swim throught
(10)the year. I also like watching the swimming event in
(11)the Olympics, and I hope I can become a lifesaver one day.
我的答案也可能有錯誤,請原諒!