Prone to do/doing

[Rustamsher]

Hello Alan,

When I looked the word up in the dictionaries, I got two different results:

(1) In the Longman Dictionary of Contemporary English:

prone to do something

Kids are all prone to eat junk food.

*While in the Cambridge Dictionaries Online:

be prone to sth/doind sth

He's prone to forgetting thing.

Which one should we trust? Or is this probably the only case when 'to' can be both a particle and a preposition at the same time?

Thanks.

*http://dictionary.cambridge.org/diction ... lish/prone

[Alan]

Yes, essentially both constructions are accepted (although I personally favour the gerund here).