He turned the doorknob with his left hand. ✬

She turned the doorknob slowly. ✬

I turned the doorknob. ✬

I saw Tom wiping his fingerprints off the doorknob. ✬

The only fingerprints that the police found on the doorknob were Tom's. ✬

Tom turned the doorknob. ✬

The doorknob broke. ✬

Don't touch that doorknob. ✬

Tom tried the doorknob, but it was locked. ✬

Tom and Mary reached for the doorknob at the same time. ✬