just an add-on to the superb answers above me. You cannot refer to a job (as in the postition, company, and/or activity that you do on a habitual basis to earn a livelihood) as a work. The sentence "I got a work with a company selling tires" is incorrect. As is "I have a work to do." Interestingly enough, a job can not only refer to the collection of tasks that compose a position, company, or activity(...), but it can also refer to a specific task. For instance: "My print job is complete." Another interesting thing about the word work: it can be a noun to reference one's job in very specific contexts, such as: I have to go to work. I need to go to work. this is the only context that I can recall at the moment.

A job involves someone who pays you to do the work. Work can be done for money (like in a job) or for free (like doing work your garden, or the work of raising children.) There is a subtle difference in what you say if you are unemployed, looking for something that earns money: I’m looking for a job. = I’m seeking employment, possibly a career. I’m looking for work. = I’m seeing something to pay the bills, even if it is not the beginnings of a career. You can say to your friend: Have fun at work today! How was work? Have fun at your job today! How was your day? [NOT How was job?] If a student does a homework assignment the teacher might say: Good job! Nice job! = you performed well Good work! Nice work! = the assignment was high quality If you sing on stage at a talent show, a friend might say: Good job! = you performed well [NOT “Good work!” because it was a leisure activity (singing) not something required] If you hand knit a scarf, someone might say: Nice job! = the overall project of making a scarf was a success Nice work! = the workmanship (the knitting) is very beautiful You can ask a new person: Where do you work? = at what company or in what city do you work? What is your job? = what is your profession

TO WORK - is the verb. I work as a language teacher I work at a language school JOB - is the noun My job involves teaching English. We can also say My work involves teaching English. Work can be both a verb and a noun. Job can never be a verb!

Job is what you practise (doctor, architect...) and work is the action of doing something For exemple when you say I've some work to do it can have a relation with your job or with your studies .....