在英文中评价别人的表现时，可以根据不同的情境和评价内容选择合适的词汇和句型。以下是一些常用的表达方式：

1. 表扬出色表现：

"You've done an excellent job!"

"That was a fantastic performance!"

"You really impressed me with your work."

"Your contribution was invaluable to the project."

"You've exceeded expectations!"

2. 表扬努力：

"You've put in a lot of effort, and it shows."

"Your dedication is commendable."

"You've really stepped up to the challenge."

"Your hard work has paid off."

3. 提供正面反馈：

"I appreciate the way you handled that situation."

"You've got a great attitude."

"Your communication skills are impressive."

"You've made a positive impact on the team."

4. 表达轻微的批评或建议：

"There's room for improvement in this area."

"I think you could benefit from some additional training."

"It might be helpful to focus on this aspect more."

"I believe you can do even better."

5. 表达中立或客观的评价：

"You did a good job, but there's always room for improvement."

"The results were satisfactory, but not outstanding."

"You've met the requirements, but there's potential for more."

6. 鼓励和激励：

"Keep up the good work!"

"You're on the right track."

"I believe in your abilities."

"You have the potential to achieve great things."

根据具体情境，你可以灵活运用这些句型和词汇，以表达恰当的评价。