He began to sing under his breath as Danica moved in at him.

He was singing to himself, half under his breath; she paid no attention, until she happened to catch a few words.

He was singing with it, very low, under his breath.

I sang a song under my breath, along with all the rest.

Then I sang a couple of lines quietly under my breath for her.

I began to sing the hiding song under my breath nevertheless.

She sang a few words under her breath so that Cesar knew what he was to sing.

She sighed once more and sang the line from the song again under her breath.

"Do not crank your head around," I sang under my breath.

She was singing quietly under her breath, some poem she'd written in the old language.