例如： An authorized person must show that they have security clearance.
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 is underbudgeted.
2). This is one of the public-relations functions, which are underbudgeted.
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.选词正确. 好像affect和effect, operative和operational等等就要弄清楚才好用啦.
9.拼字正确. 有电脑拼字检查功能后 ， 就更加不能偷懒.
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.