同学你好，该知识点来自沪江网校《BEC商务英语初中级 四项全能实战签约 【全额奖学金班】》的课程，想要更系统的学习，欢迎进入课程学习。不仅可以和更多的同学一起学习，而且还有老师、助教随时的学习指导和知识点解答哦。

同学，您好~
以下句型供您参考：
1. I have been for over five years in teh employ of an exporting company.

本人曾经前后五年被受雇于出口贸易公司。

2. I have been in the business for the last ten years, and worked as the superintendent in the personnel department.

本人在过去十年在商界担任人事部主任迄今。

3. I have had five years' experience with a company as a salesman.

本人曾在某一公司担任推销员，前后有五年之久。

4. For the past three years, I have been in the office of the Brothers Trading Co., where I have been ad still am an accountant.

本人曾经在兄弟贸易公司服务三年，担任会计工作，现仍在职中。

5. I am twenty years of age, and have been employed for the last two years by the Green Trees Co., in teh general clerical work of the office.

我今年20岁，曾于绿林公司服务两年，担任一般文员工作。

6. I am 25 years of age, and have had two years' experience in my present post, which I am leaving to better myself.

我今年25岁，已在目前的职位工作两年，兹为寻找更上一层楼，准备离开此职位。

7. I am nineteen years of age, female and have had two years' experience in a company's delivery office.

我今年19岁，女性。曾在某家公司担任收发工作两年。

8. I am just leaving school, and am eighteen years of age.

本人18岁，不久即可毕业。

9. I am twenty years of age, and am anxious to settle down to office work.

本人20岁，希望能找到一个公司，以便安定下来。

10. Since my graduation from the school two years ago, I have been employed in teh Green Hotel as a cashier.

两年前，自从离校后，在格兰酒店担任出纳员。

My first job is work as ... 不可以这么表达哦，be动词is 和动词不可以同时存在
可以说：My first job was as ...

祝您学习愉快~