We can combine the prepositions "through" and "across" in a sentence to describe a journey, a change in perspective, or a narrative development.

Combining "through" and "across" in a sentence usually involves describing a journey or movement where the path taken involves both moving within or among something (indicated by "through") and then traversing over a surface or area (indicated by "across"):

The hiker trekked through the dense forest and across the mountain ridge to reach the summit.

In the example above, "through" describes the action of moving within the enclosed space of the dense forest, implying a more immersive passage. "Across" then describes the action of moving over the surface of the mountain ridge, indicating a more open, expansive movement. The sentence effectively captures a transition from a confined environment to a broader, more open space.

More examples:

Sarah moved gracefully through the crowded room and danced across the ballroom floor.

The sunlight streamed through the window and spread across the hardwood floor, lighting up the room.

The tourists journeyed through the ancient ruins and walked across the old stone bridge to get a better view.

What's the difference between "through" and "across"?

Additionally, you can use "through" and "across" to indicate:

• Metaphorical Journey:

  The novel takes the reader through a complex web of emotions and across a vast landscape of historical events.

• Change in Perspective:

  Her research led her through detailed archives and across various fields of study.

• Narrative Development:

  The plot moves through a series of suspenseful events and across multiple settings, keeping the reader engaged.

• Sequential Actions:

  The bird flew through the forest canopy and across the open meadow in search of food.