Grant looked at his glass with a slightly worried look.

He had a slightly worried look on his face.

His face looked intelligent enough, though there was a slightly worried look in his eyes.

She looked up and saw Benson regarding her with a slightly worried frown.

Puzzled, and growing slightly worried, she got out of bed.

Julian looked around the ring of puzzled and slightly worried faces.

Knocker came over to serve them with a slightly worried look on his face.

The slightly worried look did not leave the innkeeper's shiny, round face.

Then the voice continued, in a slightly worried fashion.

A slightly worried look appeared on the other's face.