What are the words of mourning for the death of a classmate?

Mourning the death of a classmate is:

1, when the reality cannot be changed, we can only learn to be strong, blossom and fall, and everything in the world begins and ends, which is a natural law. Please don't be sad, life goes on.

People can't be resurrected after death. Don't be so sad. You should comfort him with your performance. Although he is gone, we who are alive still have to live well.

We are very sad to hear the sad news. I know this is a very difficult time for you. You are in my heart.

4, birth and death, everything is a natural phenomenon; No one has died since ancient times, as long as they live in my heart.

5, life is like this, want to have but can't have, may make people give up on themselves.

6. The dead are gone, and the living regret their loss.