I doubt you could find a single example of my ever having used it myself.
I doubt there's any evidence of me using it before.
I'm sure there are several examples of me using it in the past.
3 girls are taking part in martial arts.
There are plenty of older people outside.
Do you both want roast beef for dinner?
A woman is playing the guitar.
Pelicans play pingpong.
A person is upright in water.