Hi teacher,
In a narration, writers often use simple past tense because the actions happen in the past, but sometimes they use present tense to express the truth. In which other cases we should use present to describe the action?
If you know more about how to use tense in narration, please help me!

In a narration, writers often use simple past tense because the actions happen in the past, but sometimes they use present tense to express the truth. In which other cases we should use present to describe the action?
If you know more about how to use tense in narration, please help me!