One parent to another: �Our teenage son is really getting bored when he has some free time - we �ll have to find some work for him to do. �
Teacher: �I wish my job was only giving lessons, but I have so much work to do with planning, paperwork, grading, etc. that I sometimes get tired even before my lessons begin. �
Employer in a small company: �There is so much work to do, but I simply cannot afford yet to give someone new a job here. I will have to do all the work myself till the company business develops a bit more. �
Fireman: �My job is really dangerous and difficult, but, fortunately, there are days when there is hardly any serious work to be done. �
work= any kind of duty/activity that has to be performed and you do giving it your time and energy - at your workplace, at home, at school, wherever
job= working position, being employed
For a more detailed and more professional explanation, you might want to visit this
link.