I love surfing! It's so much fun to ride waves all the way into the shore. Have you ever been surfing?
i have never been it is kind of hard to surf where i live
Yes, usually surfing is done in the ocean, but it can also be found in lakes or rivers! 
 i never thought about river surfing, that would be cool to do
Yes, it takes a little creativity and a friend with a boat. Usually river or lake surfers utilize the wake from boat wakes!
or you can surf on white rapids, i wonder if anyone has done that, i have never seen it done
Me neither, that would be wild! Sometimes if the waves are rough, instead of stand up surfing, I ride a bodyboard, usually lying on my belly! That's a lot of fun too!