1
I feel confident about the test.
To sign this, point to yourself for 'I', then sign 'confident' using the firm downward motion into fists. Finish by signing 'test'. It is crucial to keep your facial expression assured and your posture upright to match the positive, self-assured meaning of the sentence.
2
She is a confident leader.
Start by pointing to the person for 'she', sign 'confident' with strong, decisive fists, and then sign 'leader'. Make sure your body language is upright and your expression is positive, reflecting the strong, capable characteristics of the person you are describing to your conversation partner.
3
You need to be more confident.
Sign 'you' by pointing, followed by 'need' and 'more', finishing with the sign for 'confident'. Emphasize the strong downward pull of the fists and use an encouraging, supportive facial expression to effectively motivate and uplift the person you are speaking to.