When to use double words side by in a sentence?

You're likely thinking of the phrase "side by side." It's a prepositional phrase meaning "next to each other" or "in close proximity." Here's when you might use it:

* Describing physical position: "The two cars were parked side by side in the driveway."

* Describing parallel activities: "The students worked side by side on their projects."

* Emphasizing cooperation or togetherness: "They fought side by side in the battle."

Here are some examples of how to use "side by side" in a sentence:

* The twins sat side by side on the park bench, sharing a bag of popcorn.

* The hikers walked side by side along the scenic trail.

* The team members worked side by side to complete the task on time.

You wouldn't use "side by side" as separate words unless you were specifically emphasizing each word individually, which is uncommon.