Hi, I need human help

Are these sentences past simple?

When the brothers grew up they founded the city of Rome.he was about six years old. He was named Dina and went to live with humans, but he never learned to speak. The wolf-girls Kamala and Amala were also Indian.the girls were autistic. what kind of animal Peter lived with.He ran very fast on all fours. ended up living in the jungle with monkeys.she really lived with dogs.a priest who said the girls were discovered in 1920.  

any advice would really help me learn past simple vs present perfect forms