自信的英文短句如下：
1. Self-confidence is the first step to success.
2. I am confident that I can achieve my goal.
3. I believe in myself and am determined to succeed.
4. With confidence, I can do anything.
5. I am sure of my abilities and confident in what I can achieve.
6. I am self-assured and believe in my abilities.
7. I have the confidence to face any challenge.
8. I am brave and confident, ready to take on any task.
9. I trust in my abilities and am confident that I can achieve my goals.
10. With courage and confidence, I can accomplish anything.