1. We shouted good expressions together with the sash around the upperbody at the beach.
2. I learned how to use ropes when we go down a cliff in a mountain.
3. We got together and learned new songs accoring to the guitar sound of the leader.
4. We cleaned the beach by picking up cans, garbage, etc.
5. I learned how to give CPR to a bleathless person to wake him up.
6. I learned how to give first aid to save the life.
7. I learned how to use ropes to climb a cliff.
(Would you like to check the sentences above? Thank you.)
1. We shouted good expressions together with the sash around the upperbody at the beach.
I don't understand this one at all, sorry! Are you trying to describe a celebration in a costume on a beach?
2. I learned how to use ropes when we go down a cliff in a mountain.
This is fine; you can also write, "I learned how to use ropes and rappel down the mountain."
http://www.answers.com/rappel
3. We got together and learned new songs accoring to the guitar sound of the leader.
Corrected: We got together and learned new songs while the leader played his guitar.
4. We cleaned the beach by picking up cans, garbage, etc.
Good!
5. I learned how to give CPR to a bleathless person to wake him up.
Corrected: I learned how to give CPR and bring a person back to life.
6. I learned how to give first aid to save the life.
A little correction: I learned how to give first aid and save someone's life.
7. I learned how to use ropes to climb a cliff.
Good!!
Here are the corrected sentences:
1. We enthusiastically shouted good expressions while wearing sashes around our upper bodies at the beach.
2. I learned how to use ropes for rappelling down a cliff in the mountains.
3. We gathered together and learned new songs based on the guitar playing of the leader.
4. We cleaned the beach by picking up cans, garbage, and other types of litter.
5. I learned how to perform CPR to revive someone who is not breathing.
6. I learned how to administer first aid to save a life.
7. I learned how to use ropes for climbing cliffs.
All the sentences have been edited for clarity and grammar. They now convey the intended meaning clearly.