商业书信通常都非常正式，要求表达一定要非常清晰，否则会给业务来往造成麻烦。下面是有关文法的tips，看看你有没有犯同样的错误哦！

　　1、切忌主客不分或模糊。例子： Deciding to rescind¹ the earlier estimate, our report was updated to include $40,000 for new equipment. 应改为 Deciding to rescind our earlier estimate, we have updated our report to include $40,000 for new equipment. (是We 来decide, 不是report.)

　　2、句子不要零碎。例子： He decided² not to audit³ the last ten contracts, because of our previous objections about compliance⁴. 应该连在一起.

　　3、对称的结构比较容易让人理解。例子： The owner questioned the occupant's lease intentions and the fact that the contract had been altered with ink markings. 应改为: The owner questioned the occupant's lease intentions and ink alterations⁵ of the contract.

　　4、 单复数不要搞乱，不然会好刺眼，看着不舒服。例如： An authorized⁶ person must show that they have security clearance⁷.

　　5、 动词主词要呼应。 想想这两个分别： 1). This is one of the public-relations functions that are under budgeted. 2). This is one of the public-relations functions, which are under budgeted.

　　6、 时态和语气不要转变太多。看商务英语已经是苦事，不要浪费人家的精力啊。

　　7、标点要准确。例如: He did not make repairs, however, he continued to monitor the equipment. 改为: He did not make repairs; however, he continued to monitor the equipment.

　　8、选词要正确，像affect和effect，operative和operational等等就要弄清楚才好用啦。

　　9、拼写要正确，有电脑拼字检查功能后，就更加不能偷懒。也许一笔好买卖就因为你的一个错字飞掉了哦!

　　10、 大小写要注意。非必要不要整个字都是大写，除非要骂人。例如: MUST change to OS immediately. 外国人就觉得不礼貌和喝令人一样。要强调的话，用底线，斜字，粗体就可以了

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