如何写一封非正式的商务信函

Use writing that is breezy rather than casual. Be brief, straightforward and logical.写作是简洁，而非马虎的。简约，直接和有逻辑地表达出来。

Employ standard grammar, spelling and formatting rules, but relax your tone and construction slightly.
按照标准的语法，书写和格式规则，但是要通顺流畅，结构尽量简单。

Use contractions and conversational phrases to soften the letter.
尽可能使合同和对话的词语更人性化。

Begin with the date, both your address and the recipient's (or just your address) and a salutation.
开始要注明日期，还有你的地址以及收信的地址(或者仅仅是你的地址而已)，并且要给予问候。

Choose "Dear" over "To Whom It May Concern."
最好选择“亲爱的”除此之外还有“某相关负责人”。

Place a comma after the salutation (Dear Jane,) instead of a colon.
在问候语（亲爱的简）后面使用逗号，而并不是句号。

Use personal statements to make the letter less formal: "I agree with your assessment of the highway construction project. I too commute that way."
使用个人陈述会使信的内容显随意：“我同意你对建设高速公路项目的资产评估。我决定改变主意。”

Close with "Best," "Cheers" or "Regards," rather than "Sincerely" or "Thank You."
结束时，最好使用带有“最好的”“欢呼的”或者“敬语”的用语，而不是简单的“诚挚”或者“谢谢”一带而过。

Tips & Warnings 提示及注意点

Formal business letters are typically reserved for legal or official correspondence.
正式的商务信函或者官方信函必须是合法的。

Casual correspondence usually takes the form of a memo, note or e-mail letter.
非正式的信函，通常是那些备忘录，通知以及邮件。