prove to be sth
fixed phr..fixed phr.. to show a specific quality or result over time, especially when it is different from what you expected.
fixed phr.. to be found to have a particular quality or to result in a particular outcome; functions as a copular verb phrase indicating a discovered reality.
The new software proved to be very useful for our team.
Although the initial plan seemed risky, it proved to be the most profitable strategy we ever used.
The archaeological findings, which were initially dismissed as insignificant, proved to be a major breakthrough in understanding Bronze Age trade routes.
usually followed by an adjective or a noun phrase that describes the subject.
contrast with 'turn out to be'; 'prove to be' often implies a period of testing or a situation where a quality is demonstrated through evidence.
The task proved being difficult.The task proved to be difficult.the verb 'prove' in this sense requires the infinitive 'to be' rather than a gerund.