1
He was sometimes prone to deep despair.
2
As he was sometimes prone to do.
3
She was sometimes prone to think that that prize was not exactly all that she had once hoped.
4
Q My nine-year-old girl is generally a happy child, though sometimes prone to being a little anxious and shy.
5
Her eyes had narrowed a little, as the Colonel's were sometimes prone to do, and her lips were pressed firmly together.
6
Sometimes prone, sometimes supine, but always decumbent.