She is practicing the back crawl in the swimming pool.

She performed a perfect back dive.

I live in a small town in the back of beyond.

We need to have a back-up of food and water in case of emergencies.

He lay on his back.

The nurse took care of the patient and nursed them back to health.

I've been suffering from lower back pain for a few days now.

I go back and forth between my home and work every day.

I want to give myself a pat on the back for completing the project ahead of schedule.