My son like to play swimming pool with his friends.

- My son likes to play in the pool with his friends.

But he don`t know how to swimming.

- But he doesn't know how to swim.

If it is weather sunny this weekend, I `ll go to public swimming pool with son & his friends.

- If it is sunny this weekend, I'll go to a public swimming pool with my son and his friends.

Weather caster say that it is rainy this weekend.

- Weathercasters say that it will be rainy this weekend.

I hope that weather caster be wrong.

- I hope that weathercaster is wrong.

Most Korean say that Korean national weather service is more wrong than meet right.

- Most Koreans say that the Korean national weather forecast is more wrong than right.