Sarah will have run to the store by the time you get here so we won’t be late.‘She ran her usual route to the store, but as she
This tense choice is smart for Calvino’s novel since it increases the puzzling nature of the story. In If on a winter’s night a traveler, you, the reader, are a character who buys Calvino’s novel If on a winter’s night a traveler, only to discover that there are pages missing. When you attempt to return it, you get sent on a wild goose chase after the book you want.
Tense itself can enliven an element of your story’s narration. In a thriller novel, for example, you can write tense scenes in first person for a sense of present danger:
A muffled shot. He sits up in bed, tensed and listening. Can’t hear much other than the wind scraping branches along the gutter.