I felt like he stabbed me in the back when he revealed my secret.

I met an old friend a while back at a community event.

When the enemy advanced unexpectedly, the soldiers had to fall back to a safer position.

Our feud traces back to our childhood.

During the dance performance, the dancers moved back and forward gracefully across the stage.

When the bitter taste hit his tongue, he couldn't help but spit back the medicine in disgust.

Even though everyone rushed to join the celebration, Lisa decided to hang back to take a moment to gather her thoughts.

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.