彼女はレストランで一緒に働いていた時の同僚ですって英語でなんて言うの？

When talking about a person you worked/work with then you refer to them as your 'coworker' or 'colleague' you can also say 'we worked together' to describe this as well

Two ways to say this would be 1. "We used to work together at the restaurant!" used to - explaining that working together was something that was done in the past, but does not happen anymore. "This is _________. She was my coworker at the restaurant" This is _______ - begin by introducing your friend by name. Was - states that this is a past coworker, not someone you work with now. Coworker - someone you worked alongside or worked with at your job.

"She is an old colleague from work." "Old" in this sentence implies you used to work together but don't anymore. "This is ***. We used to work together at the restaurant." When you say "at the restaurant" it implies the person you are speaking to is also aware of the restaurant you are referring to. If not, you could say "we used to work at a restaurant together" instead.

Of these two examples, the second is more formal. To work "alongside" someone means to work with them or to work together. Therefore, this is appropriate for the restaurant context as people in a restaurant often work as a team!

The literal translation from Japanese to English is "She is a colleague when she worked together in a restaurant." This is both grammatically incorrect, and it makes no sense. So, here are some correct ways of saying what you are trying to say: 1. We used to work together at a restaurant. 2. She was my co-worker at a restaurant. 3. She was a collegue of mine when we worked at a restaurant together. All of these statements are grammatically correct, and they make more sense. All of these statements get across what you are trying to say correctly, and it is ok to use any of these statements.

In order to explain that someone was a former colleague of yours from a restaurant, you can say: We worked together in a restaurant. This means that you both worked in that restaurant at the same time, most probably doing the same role. This can apply to both male or female colleagues. We were coworkers in a restaurant. This means that you worked at the same level in the restaurant, perhaps as waitresses/bar staff/front of house (these are the types of untrained roles generally found in a restaurant). We worked in the same restaurant. This means that you worked with the person (male or female) at the same restaurant. You can also say: She was a fellow worker of mine in that restaurant. I hope that helps!