四级作文书信通知类【一】
位置在下面称呼语隔一行，是信的核心部分。因此要求正文层次分明、简单易懂。和中文信不同的是，正文中一般不用hello！（你好！）
正文有缩进式和齐头式两种。每段书信第一行的第一个字母稍微向右缩进些，通常以五个字母为宜，每段第二行从左面顶格写起，这就是缩进式。
但美国人写信各段落往往不用缩进式，用齐头式，即每一行都从左面顶格写起。商务信件大都采用齐头式的写法。
四级作文书信通知类【二】
Dear my father and mother,
This letter is my inner feelings. I want to thank both of you for so many years’ care and help.
During my growth, you have made a lot of efforts and love for me. When I make a success, both of you are more excited than me, and support me to do better. Even though I have failed, you always share sorrow with me and encourage me not to give up. Especially, during my preparation for CET-4, the support from you is always everywhere. I have passed the exam successfully.
You love is so unselfish that I am deeply affected, so I will study hard to be a useful person and won’t make you disappointed. Anyway, I would like to express the deep gratitude to you.
With best wishes.
Sincerely yours,
Li Ming
四级作文书信通知类【三】
信件如果有附件，可在信纸的左下角，注上encl：或enc：，例如：encl：2 photos（内附两张照片）。如果福建附件不止一项，应写成encl：或encs。
我们有时可看到在称呼与正文之间有re：或subject：（事由）字样。一般在信纸的中间，也可与“称呼”对齐。还应在底下加横线，以引起读信人的注意，使收信人便于在读信之前就可了解信中的主要内容。事由一般在公务信函中使用，也可以省略。
