As the 1980s wore on, his behavior grew more erratic.

During this time, his behavior grew increasingly strange.

Despite the medications, Michael's behavior has grown increasingly disruptive.

Toward the end of summer, when the colony reaches peak size, their behavior grows more aggressive.

Over the years his behavior as a public personality grew startling.

Indeed, the behavior of both men grows more and more erratic as they near Chicago.

Though he recovered and returned to his team, his behavior grew erratic from then on.

His behavior had been growing erratic for a while earlier, only she had chosen not to pay attention.

Kathleen's bad behaviour had grown from a very simple thing-the feeling that she was a failure.

As we journeyed, her behavior grew even more tiresome than it had been when we started.