Sentence examples for has certainly proven from inspiring English sources

"Be like the tree which, when battered by stones, drops its finest fruit," he said.His most prominent adherent, President Muhammad Morsi, has certainly proven resilient.

He has certainly proven his managerial worth in some style.

The effort is still a ways off from launch — these things take time — but Planet has certainly proven capable of designing and launching on a relatively short timeframe.

It has certainly proven reassuring to find that there are many researchers out there, both in academia and industry, who thoroughly enjoy their work and could not imagine doing anything else.

And, that has certainly proven to be the case.

Al Qadea has certainly proven that it's slow and methodical in its planning.

This has certainly proved a popular move.

The new Crown Prince has certainly proved to be daring.

Dr. Dean has certainly proved he's tough.

Dowd, of the Times, says, "Newt Gingrich has certainly proved that politics and science fiction do mix.

VW has certainly proved that it can build a luxury car.