I tried to say something, but no sound came out.

The boy's mouth was open before the sound came out.

Later, he was never sure if any sound had come out.

Her mouth moved, as if to ask a question, but no sound came out.

She tried to form the words, but no sound came out.

I open my mouth to say something but no sound comes out.

I opened my mouth to say something, but at first no sound would come out.

His mouth moved a little, but no sound came out.

His mouth worked several times before any sound came out.

He was trying to say something, but no sound came out.