Princess Mary listened attentively to what he told her.

He listened attentively, asking questions now and then to clarify.

Pierre listened to her attentively and seriously.

He looked attentively around at the circle of officers, recognizing several of them.

When Prince Andrew spoke (he could tell a story very well), Natasha listened to him with pride; when she spoke she noticed with fear and joy that he gazed attentively and scrutinizingly at her.