I don't think you have changed at all! Xiao Li shouldn't have failed to recognize you. 我觉得你一点儿也没变,小李不应该不认识你呀!
Teachers ought to be patient with students. 教师对学生应该耐心。
牛津高阶第八版
美国韦氏词典
Dictionary.com
Free Dictionary
维基百科 (自由的百科全书)