要表达“表现得更加自信”这个意思，可以使用以下几种英语表达方式：
- Be more confident
- Show more confidence
- Act with greater confidence
- Exude confidence
- Display increased self-assurance
- Project confidence
- Present oneself with more confidence
- Be brimming with confidence
- Showcasing greater self-confidence
- Step up to the plate with more confidence
这些表达可以根据不同的语境和需要调整，以适应不同的场合和语气。