Everyday: (adjective)
* I wear everyday clothes to the gym. (Meaning: regular, ordinary clothes)
* She has a collection of everyday objects from her travels. (Meaning: typical, common items)
Every day: (adverb phrase)
* I go for a walk every day. (Meaning: each day, daily)
* He reads the newspaper every day before work. (Meaning: each day, daily)
Here are some sentences combining both:
* I wear my everyday clothes every day, but I change into something nicer for special occasions.
* She enjoys finding unique everyday objects to add to her collection, and she always visits antique stores every day on her travels.