游泳 (swimming)

我有很多爱好。一个是游泳。

我有很多爱好。其中一个是游泳。   added "其中", the more smooth.

每个礼拜日我走到游泳池。

每个礼拜日我都要去游泳。 if you want to say "i am going to swimming every sunday."

从我的房价需要十五分钟。

从我家到游泳池大约需要十五分钟。

有人认为游泳很无聊可是我喜欢潜水。

有人认为游泳很无聊，可是我很喜欢（泡）在水里的感觉。  "潜水"not equals swimming, i think it equals dive. 

一般我四十分钟游泳然后回来。

一般我游四十分钟就会回家。

这个游泳池很老，可是使用的。

这个游泳池很老，不过还可以使用。

我很早去，所以在回来的路上我买早餐。

我去得很早，所以在回家的路上我可以（顺便）买早餐。

I have many hobbies. One of those hobbies is swimming.
Every Sunday I walk to the swimming pool.
From my house it's about 15mns away.
Some people think swimming is boring but I like being in water.
I usually swim for 40 minutes then I head back.
It's an old swimming pool but it is very practical.
I go early so on the way back I buy breakfast.

游泳 (swimming)

我有很多爱好。其中一个是游泳。
每个礼拜日我走到游泳池。
从我的房间去需要十五分钟。
有人认为游泳很无聊，可是我喜欢潜水。
一般我用四十分钟游泳，然后回来。
这个游泳池很老，可是还是在使用的。
我去得很早，所以在回来的路上我（顺便）买早餐。

I have many hobbies. One of those hobbies is swimming.
Every Sunday I walk to the swimming pool.
From my house it's about 15mns away.
Some people think swimming is boring but I like being in water.
I usually swim for 40 minutes then I head back.
It's an old swimming pool but it is very practical.
I go early so on the way back I buy breakfast.

Hi.Nice to meet you.I am a Chinese teacher on italki.I hope we can meet so that I can help you with your Mandarin!So welcome to take my class.Thank you.

游泳 (swimming)

我有很多爱好。，一个是游泳是其中之一。
每个礼拜日我走都会到游泳池。
从我的房价家到游泳池需要十五分钟。
有人认为游泳很无聊，可是我喜欢潜水泡在水里的感觉。
一般我游四十分钟游泳，然后回家回来。
这个我去的那个游泳池很老，可是仍在使用中。
我很早去去的很早，所以在回来的路上我还能买到早餐。

游泳 (swimming)

我有很多爱好。有一个是游泳。
每个礼拜日我（走到）去游泳池。
从我的房子（价）到那需要十五分钟。
有人认为游泳很无聊，可是我喜欢潜水。
一般我游四十分钟，（游泳）然后回来。
这个游泳池很老，可是是可以使用的。
我去得很早（去）（，）。（所以）在回来的路上我买早餐。

I have many hobbies. One of those hobbies is swimming.
Every Sunday I walk to the swimming pool.
From my house it's about 15mns away.
Some people think swimming is boring but I like being in water.
I usually swim for 40 minutes then I head back.
It's an old swimming pool but it is very practical.
I go early so on the way back I buy breakfast.