一般包括以下几个要点：
1) 收信人的姓名和地址;
2) 寄信人的姓名及其与收信人的关系;
3) 寄信人的'地址(有时可以省略);
4) 写信的时间;
5) 信的内容。
1. 书信的格式
1) 信头(Heading);
2) 称呼(Salutation);
3) 正文(Body of the letter);
4) 结束语(Complimentary close);
5) 签名(signature)。
Dear friend,
亲爱的朋友，
Hello, I'm your new friend. My name is [ename]Bob[/ename]. I'm fifteen. I'm American. I live in New York.
你好，我是你的新朋友。我的名字叫鲍勃，我十五岁，是美国人，我住在纽约。
I am a middle school student. I'm good at maths. It is very interesting. My favourite sport is basketball. And I am not only a basketball fan but also a good player. I like music. My friend and I often sing pop songs together.
我是一个初中生，我擅长数学，它很有趣。我最喜欢的运动是篮球，我不仅仅是一个篮球迷，也是一个很好的选手。我喜欢音乐，我经常跟我的朋友一起唱流行歌曲。
After school, I am interested in getting on-line. I have known a lot about China from the Internet. Now I am learning Chinese. I hope I will visit your country one day.
放学之后，我喜欢上网，通过网络，我了解了很多关于中国的事情，现在我在学汉语，我希望有一天能去你的国家游览。
Please write to me and tell me something about your life. I am looking forward to hearing from you.
请给我回信说说你的生活吧，我期待着你的来信。
Yours,
你的，
Bob
鲍勃
ear David,
I'm glad you'll come to Beijing to learn Chinese. Chinese is very useful, and many foreigners are learning it now. It's difficult for you because it's quite different from English. You have to remember as many Chinese words as possible. It's also important to do some reading and writing. You can watch TV and listen to the radio to practise your listening. Do your best to talk with people in Chinese. You can learn Chinese not only from books but also from people around you. If you have any questions, please ask me. I'm sure you'll learn Chinese well.
Hope to see you soon in Beijing.
Yours,