I work at school all my life.

I have been working at school all my life.

I am a teacher. I have been working at school all my life.
I have been working at school since I graduated from the pedagogical college.
I like my job. I dreamed of being a teacher when I was a child.
I have been working as a teacher for ten years.
I have helped many children and I  will always help them in the future.

I work at school all my life.

I am a teacher. I have been working at school my whole life. 
I have been working at school since I graduated a pedagogical college. 
I like my job. I dreamed to be a teacher a when I was a girl.
I have been working as a teacher for ten years. 
I helped many children and I will always help them in the future.