在英文中评价别人的表现时，可以根据不同的情境和评价的意图使用以下几种方式：

1. 积极评价：

"You did an amazing job on the presentation."

"Your performance was outstanding, especially in the last quarter."

"I was impressed with how well you handled the situation."

"You've shown great progress since the last project."

"Your creativity in solving the problem was truly remarkable."

2. 中立评价：

"You've met the expectations for this task."

"Your work is consistent, and you always deliver on time."

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

3. 建设性批评：

"While your report was comprehensive, it could benefit from a more detailed analysis."

"I noticed that the project timeline could be optimized for better efficiency."

"It would be helpful if you could provide more context in your next report."

4. 具体评价：

"Your attention to detail in the design was exceptional."

"Your communication skills during the meeting were clear and effective."

"Your contribution to the team was invaluable, especially in the brainstorming session."

5. 鼓励性评价：

"Keep up the good work; you're making a real difference."

"Your dedication is paying off; I believe you can achieve even more."

"You've set a high standard for the team; let's keep it going."

根据具体情况，你可以选择合适的表达方式来评价别人的表现。记得在评价时要保持尊重和建设性，这样你的评价才会更加有效。