Proved

Our attempt has proved to be a failure.

The girl who I thought was a singer proved to be a different person.

In due time, his innocence will be proved.

All my efforts proved of no avail.

It proved to be the deathblow to their plan.

It was an event that proved extraordinary.

It proved the truth of the rumor.

The vague rumor proved to be false.

The extra room proved very useful when we had visitors.

The report proved only too true.