The Best Answer Is Example of the conflict between his mind and body is He is physically weak, but his mind is sharp.Even though his mind capable in finding out what Gregor supposed to do in his life, his body simply wouldn't allow it in happen, which cause Gregor, even more, struggle because he can't rely on ignorance to comfort his helplessness.
I would say he would use words that make his tone sound sarcastic in the readers mind. Or after the character's line it would say...EXAMPLE: "Oh really" Alice said sarcastically
