1
I tried to ignore the loud noise outside.
When signing this sentence, you can emphasize the loud noise by making the outward motion of 'ignore' a bit more forceful. Start at the nose and push the '4' handshape outward firmly, showing your active effort to push the distraction away from your awareness.
2
Please don't ignore my text messages.
To convey this request, pair the sign for 'ignore' with a pleading or serious facial expression. Ensure the outward motion from your nose is clear, visually representing the act of dismissing the text messages that you want the other person to pay attention to.
3
She decided to ignore the negative comments.
In this context, the sign for 'ignore' should look intentional and decisive. As you move your '4' handshape away from your nose, you can slightly turn your head in the opposite direction to physically embody the act of disregarding the negative comments.