以下是一些用英语评价学生表现的常用表达：
He/She is a great student. 他/她是个很棒的学生。
He/She has shown a lot of improvement. 他/她进步很大。
He/She has made a lot of progress. 他/她取得了很大的进步。
He/She has done an excellent job. 他/她干得很出色。
He/She has performed well. 他/她表现得很好。
He/She has shown a lot of potential. 他/她有很大的潜力。
He/She has done a good job. 他/她干得不错。
He/She has made some progress. 他/她取得了一些进步。
He/She is improving. 他/她在进步。
He/She needs to work harder. 他/她需要更加努力。
以上表达仅供参考，评价学生表现时要结合具体情况，根据学生的优点和不足进行客观评价。
Don’t be shy. I’m sure you can do it.
