To make things worse, Ivan usually sounds much more convincing.

Even in his own head he did not sound very convincing.

He sounded very convincing, but I wasn't quite ready to believe him yet.

But it didn't sound very convincing- not even to him.

Even to herself she sounded much less convincing than usual.

Somehow, he knew, it wouldn't sound very convincing in those circumstances.

But his cold was getting better and it did not sound very convincing.

I tried to sound convincing, but he just rolled his eyes.

Trying to sound convincing as possible he said, "I'm not one of them, you know."

I think my story will sound more convincing than yours.