He acknowledged my presence with a nod. ✬

I always get nervous in her presence. ✬

I can feel Tom's presence. ✬

I didn't want to say anything in Tom's presence. ✬

The screening of donated blood for the presence of various illnesses is expensive, but is also necessary to keep the blood supply as safe as possible. ✬

I could sense Tom's presence. ✬

Tom seemed uneasy in my presence. ✬

Tom seemed uneasy in Mary's presence. ✬

I feel Tom's presence here. ✬