Here's how you do it:
1. Sign the verb "can": This sign is made by touching your thumb to your cheek and moving your hand outwards, like you're pushing something away.
2. Add the negative sign: The negative sign is made by shaking your head from side to side while looking at the person you're signing to.
Example:
To sign "I can't go," you would:
1. Sign "I" (pointing to yourself)
2. Sign "can" (touching your thumb to your cheek and moving your hand outwards)
3. Sign "go" (moving your hand forward in a circular motion)
4. Shake your head side to side to indicate negation.
Important note: The placement and timing of the negative sign may vary depending on the context and the specific sentence structure.
Remember: Learning ASL takes practice and exposure. The best way to learn how to sign "can't" is by finding a qualified ASL instructor or learning from resources designed for ASL learners.