英文商务信函种类繁多，从功能的角度按交际目的来分类，可以分为以下类别:
询价函)，报价函，确认函通知
知函)，允诺函)，收款函，
以及推销函，拒绝函)，索赔与理赔函(
及一些特殊的信函，如:邀请函(，感谢
函，介绍函以及指示函等。

可以看出，这种分类与信函中所实施的主要言外功
能有关，因此，我们可以运用Leech对言外行为的分类来进一步将不同类别的信函
概括为四大类:(1)“合作类信函”;(2)“和谐类信函”:(3)“竞争类信函”:(4)
“冲突类信函”English business correspondence variety, the Angle from function according to classification, communicative purpose may be divided into following categories:
Inquiry, quotation, confirmation letter)
Know), promised letter), letters,
And the sales letter, a rejection letter), claims and claims,
And some special letters, such as: the invitation letter (, thank
Letter of introduction letter and instructions, letter, etc. Can see, the classification and letter of main WaiGong said
Can, therefore, we can use the Leech on illocutionary act to further classified different types of letters
Summarize four types: (1) for the cooperation of letters," (2) "harmonious class (3)" letters "letters" of competition (4)
"Conflict letter."
根据语言的言外功能和在语言活动中维持良
好的人际关系这一社会目标之间必然产生不同的关系，址ech(1983)将一言外行为
分为四大类:竞争类()，和谐类(convivial)，合作类
以及冲突类(According to the language of the function and in maintaining good language activities
Good interpersonal relationship between the social target is different, the relationship between ech (1983) will address the word
Competition is divided into four categories: (), harmonious class (convivial), cooperation
And the conflict (
不同的交际目的对礼貌有不同程度的要求，有的交际功能对礼貌的要求高些，
另外一些功育
Different communicative purpose to have different degrees of politeness, some of the communicative functions of high requirements, politeness
Other work and pay the required (politeness is low.合付礼貌的要求则可低些。

function。