证明Certificate
证明书种类很多，有工作经历证明、工作经验证明、病情证明、留学生经济担保书、学业成绩证明书等等，是用来证明一个人的身份、学历、婚姻状况、身体情况等或某一件事情的真实情况。证明信的写法通常也采用一般信件格式，但多省掉收信人的姓名、地址和结束用语。称呼多用“To Whom It May Concern”意即“有关负责人”，但此项也可省略。写证明书要求言简意赅。
常用句式：
1、This is to certify that…
特此证明……
2、I hereby certify that…
特此证明……
3、Mr.Li was admitted into our hospital on…and will be discharged on…
李先生于……入住本院，将于……出院。
4、It is suggested that he rest for one week at home before resuming his work.建议他在家休养一周后再工作。
5、Mr.Li Ming had fulfilled all the requirements prescribed by the syllabus of the Department.
李明同学达到了院系教学大纲规定的所有要求。
6、Mr.Li proved himself to be a diligent and valuable employee through hard work.
李先生通过努力证明自己确实是一名勤勉、有价值的员工。
7、With his friendly manners and loyalty he perfectly fitted into our team.他的友善和忠诚使他很好地融入了我们的团队。
8、Mr.Li had no problem adjusting to the work in your company.
李先生会很快适应贵公司的工作的。
9、Mr.Li will surely prove adequate to the job in your company.
李先生绝对会证明自己能胜任这项工作。
医生证明书
兹证明病人托马斯先生，男，41岁，因患急性阑尾炎，于2004年6月9日住院。经立即施行手术和十天治疗后，现已痊愈，将于2004年6月19日出院。建议在家休息一个星期后再上班工作。
主治医生：杰克·霍普金斯
2004年6月18日
Doctor’s Certificate
June.18, 2004
This is to certify that our patient, Mr.Thomas, male, aged 41, was admitted into our hospital on June 9, 2004, for acute appendicitis.After immediate operation and ten days of treatment, he has completely recovered and will be discharged on June 19, 2004.It is suggested that he rest for one week at home before resuming his work.
Jack Hopkins
Surgeon-in-charge
公证书（90鲁公证字第1130号）
兹证明赵强文先生持有山东大学于1980年发给他的064号毕业文凭上的学校印签和校长周永森签字属实。
中华人民共和国山东省济南市公证处公证员：王芳2004年5月2日
Certificate(90)Lu Zi, No.1130
May 2, 2004
This is to certify that Mr.Zhao Qiangwen holds a diploma iued to him in July, 1980 byShandong University (Diploma No.064) and that the seal of University and the signature by President Zhou Yongsen are authentic.
Jinan Notary Public OfficeShangdong Province
the People’s Republic of ChinaNotary: Wang Fang
