How to Sign "I Cant Talk"
To sign 'I can't talk', begin by pointing to your chest to indicate 'I'. Next, sign 'talk' by forming a '4' handshape with your dominant hand (four fingers extended and slightly spread) and tapping it near your mouth or chin. Finally, sign 'can't' by extending both index fingers; hold your non-dominant index finger out and strike your dominant index finger sharply down across the tip of it.