The last I saw of him, he was tapping at her door.

How many of us are tapping away at a computer made here?

I went up again, and tapped at the door of her room.

The cold tapped at the glass but couldn't come inside.

She tapped at the study window, therefore, but without result.

Just in time, for she tapped at it while my hand was yet upon the key.

She had been gone but a moment when there came another tapping at the door.

He kept tapping at his mike, as though it weren't working.

Before Dan could say anything more, someone tapped at the door.

First thing I knew, there was this woman tapping at the kitchen door.