However, I am concerned over our ability to handle an emergency with the computer in its present state.

Not only have you been less than forthcoming, but you're almost proud over your ability to hide the truth.

I have no illusions over my ability to control you.

They express doubt over their ability to battle the monster.

From this perspective, too, an energy tax seems like a good idea - over and above its ability to raise revenue.

He had all the skills, but there was also a huge question mark over his ability to produce the goods when it mattered most.

Could it be envy over his ability to play hurt?

This has led to negative media and analyst sentiment over the company's ability to continue as an independent company.

But he said that the Government is still facing a crisis over its real ability to exercise power.

While the clinicians thought highly of him, there is a question mark over his scientific ability.