Question

alguien que me ayude a cambiar este texto a la voz pasiva por favor.
Our story began in Canada, when a boy called mark finds a forest.
Mark was in a park and decided to read a book. When he got bored he decided to explore the park.
As he walked, he saw a gate, but is was closed. Mark was corious about what was there, so he came and opened the gate.
When I entered, he saw that it was a really beautiful forest. As he walked, he found an otter, he thought it was cute, so much so that the played a few minutes with her.
He went on his way and saw a lake
Mark was frightened when he saw that on the other side of the lake, a large crocodile, which swam to the fish trying to eat them, but they managed to leave.
The his crocodile, seeing that the fish had escaped, left the lake, so Mark was so frightened that he ran away until he discovered that he was trapped in a pile of trees.
I arrived at a place where averything was quieter, but found a bear and the scare climbed a tree.
The bear upon seeing him, began to speak to him, telling him that he would not do anything to him, that he would come down from that tree. Mark, even in fear, got off the tree when he was finally down, the bear invited him for a walk in the woods.
They walked, while Mark talked to him of the places to which he has traveled, also told him that he once won a prize along with his friends.
The bear told him that once he caught an animal to eat it, but said he did not like it, so he never did again.
When decided to return, they realized that they did not know wherein the forest they were, the were two roads, but the forgot which way they came, they chose the one they tought was the right one, but they realized that the road they had chosen was the wrong one.
Mark did not know what to do, he was scared, he had to go home.
Of a sudden, Mark wakes up and realizes that everything had been a dream.
He had fallen a sleep in the park.
He decided to go home. When he arrived, he wrote everything he dreamed and realized that it had been a ridiculous dream and began to laught.

Answer 1

Our story began in Canada when a forest is found by Mark.
Mark was in a park and decided to read a book. He decided to explore the park when he got bored.
As he walked, a gate was seen by him, but it was closed. Mark was curious about what there was there, so the gate was opened by him.
When I entered,  a really beautiful forest was seen by him. As he walked, an otter was found by him, he thought it was cute, so much so that the played a few minutes with her.
A lake was seen by him when he walked by this way.
Mark was frightened when a large crocodile was seen by him on the other side of the lake, which swam to the fish trying to eat them, but they managed to leave.
The crocodile, seeing that the fish had escaped, the lake was left by the crocodile, so Mark was so frightened, he ran away until he discovered that in a pile of trees he was trapped.I arrived at a place where everything was quieter but a bear was found by me and how I was scared I climbed a tree.The bear upon seeing him began to speak to him, telling him that he would not do anything to him, that he would come down from that tree. Mark, even in fear, got off the tree when he was finally down, he was invited by the bear to walk in the woods.
They walked, while Mark talked to him about the places to which he has traveled, also told him that once a prize was won by him and his friends.
The bear told him that once an animal was caught to be eaten by him, but said he did not like it, so he never did it again.
When decided to return, they realized that they did not know where in the forest they were, they were two roads, but the path that they took was forgotten by them so they chose the one. they thought was the right one, but they realized that the road they had chosen was the wrong one.
Mark did not know what to do, he was scared, he had to go home.
Of a sudden, Mark wakes up and realizes that everything had been a dream.
He had fallen asleep in the park.
He decided to go home. When he arrived, his dream was written by him and he realized that it had been a ridiculous dream and began to laugh.

Es pero haber puesto todas en voz pasiva.