结合以下教学实例对该英语写作课堂教学进行分析，内容：请描述一下你的朋友，看他过去和现在有什么变化，

I have a good friend named Kevin. He is a middle school student. He has changed a lot in the past two years.He used to be shy. His face used to turn red when He talked with others. In class, he used to be quiet and didn't ask and answer questions. After school, he used to walk alone and just smiled when he met neighbours.Now, he's more outgoing than he used to .