I am not sure which of the two sentences below is correct: This theorem is very difficult to be proved. This theorem is very difficult to prove.
Either both ‘proved’ and 'proven' have merged like for many other verbs in the language that you speak, or they haven't. You can't choose to use 'proven' when it's used as an adjective and use 'proved' when it forms the passive or perfect past constructions such as "is proved," or "has proved." You will sound inconsistent!
From my understanding, the usage of "proved" in both dictionaries imply "proved to be". And I think that "prove" in the weight loss scenario also implies "prove to be", so I think all sentences are correct.
man proved to be / was proved to be | WordReference Forums
Good evening, Is there a difference between "proved" and "proven"? Which one is the past participe of to prove? Which one sounds better in a scientific context: It is not yet proven/proved, it has not been proved/proven yet... Thanks a lot!
He proved himself to be reliable. Would the meaning be different if we said " He proved to be reliable". What's the difference? Thanks. The examples are mine.
He proved himself to be reliable/ He proved to be reliable ...
In all of 1 to 3 I'm wrong and John has proved it. 1 and 2 don't imply that he proved this to others; they just don't say. Depending on the context, they might mean he proved it to me in an argument with me, but of course he might have published a journal article refuting my claim.