写作思路：分点论述提高英语成绩的方法，最后表达对李明的美好祝愿。正文如下：
Dear Li Ming:
I am very happy to see your letter. You mentioned that your English was not good enough, and hoped to improve it. Acutally it is not a tricky question. As long as you make up your mind to take measures, you will achieve your progress.
Firstly, you should keep in mind that English, as a tool for communication, is essentially a language. And as a language, the ultimate purpose for learning it is to use it to express yourself and understand others. So we can not learn it the way you learn math or physics. It has its own way.
Secondly, you should try to remember the words. Because it's the basic of English without which the language system can not be formed. It is not recommanded to rote. Yet, you should try to learn the words through context. It works better especially for the beginners.
Thirdly, you should read more English mateirals in order to foster a sense of language. By watching English movies or TV series or reading English newspapers, you will hold a vague impression of the sentence, and it may help establish your own language system. After reading a lot, you will find it easy to express yourself with proper expressions.
And last, you should find more oppurtunities to practise your achievement. Namely, to find some native English speakers or friends or teachers to chat in English.?
During the conversation, you should try to pay attention to what others use to express their mind. And if it is something new to you, you should memorize as much as possible and make it your own.
I hope with the methods stated above, you'll soon make achievement in learning English. Good luck to you.
Sincerely
Tom
翻译：
亲爱的李明：
我很高兴看到你的来信。你提到你的英语不够好，并希望提高它。事实上，这不是一个棘手的问题。只要你下定决心采取措施，你就会取得进步。
首先，你应该记住，英语作为一种交流工具，本质上是一种语言。作为一种语言，学习它的最终目的是用它来表达自己和理解他人。所以我们不能像你学习数学或物理那样学习它。它有自己的方式。
其次，你应该试着记住单词。因为它是英语的基础，没有它就无法形成语言体系。不建议死记硬背。然而，你应该试着通过上下文来学习单词。特别是对于初学者来说，它更有效。
第三，为了培养语感，你应该多读英语材料。通过看英语电影、电视剧或阅读英语报纸，你会对句子有一个模糊的印象，这可能有助于建立你自己的语言系统。读了很多书后，你会发现用恰当的表达方式表达自己很容易。
最后，你应该找到更多的机会来实践你的成就。也就是说，找一些以英语为母语的人或朋友或老师用英语聊天。在谈话中，你应该注意别人用什么来表达他们的想法。如果对你来说是新的东西，你应该尽可能多地记住，让它成为你自己的。
我希望通过上述方法，你很快就能在英语学习上取得成就。祝你好运。
真诚地
汤姆
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