Her head was still throbbing so much she could barely concentrate.

I noticed this because between his talking on the phone and the movie, I could barely concentrate.

The white hammers beat through his skull so heavily that he could barely concentrate or see beyond a few feet.

Denise worked her shift, barely concentrating, but because it was slow, it didn't really matter.

Everyone I know can barely concentrate on driving, never mind following the plot of a movie.

But she could barely concentrate on his words, let alone react to them.

He could barely concentrate; his thoughts seemed shredded by wind.

At times he could barely concentrate on his work as he counted the days until Christopher's return and anticipated what would follow.

Marianne's mother is dead, and the fourth grader, who had once done well in school, can barely concentrate now.

Sometimes it's so hard that I can barely concentrate.