大学卒業してから、ずっと同じ会社だよ。って英語でなんて言うの？

To denote that you stayed with just one company or have just one item, or wish to stress the fact that something occurred once, you can use the word 'only'. "I only love you!"

If you wanted to explain that you have been working at the same company since you graduated college/university and have never changed companies, you could say any of the following: "I've been working at the same company since I graduated college/university", "I have only ever worked for one company since I graduated from university" or "I have been with the same company since I graduated".

When you have successfully completed your studies at a university or college, you say that you have"graduated". A more casual way to say this is to say that you "finished your studies" or "finished university". "Ever since" means "since a specific point in time". When you say that you have stayed with a company ever since you graduated, it means that they were your only employer. You may have had other jobs within the same company.

If you have worked for the same company since graduating from university, you may simply state; I've worked here since graduating from university.'' You may also say; I've worked for the same company all my life.'' or I've only ever worked for one company.'' or ''I've never changed jobs.''

This sentence emphasizes the fact that you have never changed companies since you left college. College is the term for university in American English but you can exchange the words if your listener speaks British English. I hope this helps :)

"I've worked at the same place since I graduated" is a good way of saying that you have worked in the same place since Uni. You could swap "same place" for "same company" to make it a little more formal. Or you could say "I've worked in the same position/role" to be more specific (and obviously only if this is true!). If you were just talking to a friend, we might say "since Uni", whereas if you were in a more formal situation we would probably say "since I graduated from University".

When you leave college/university and pass your exams it is called 'graduating' or to 'graduate' When you say 'the same company' it means you have not moved and have alway been there (stayed there)