How do you say oh no in Russian?

There are a few ways to say "oh no" in Russian, depending on the context and the level of formality:

Informal:

* Ой, нет! (Oy, net!) - This is the most common and natural way to express "oh no" in a casual setting.

* Ох, нет! (Oh, net!) - Similar to "Oy, net!" but slightly less common.

Formal:

* Нет, пожалуйста! (Net, pozhaluysta!) - This translates to "No, please!" and is more polite and formal.

* Увы! (Uvy!) - This expresses "alas!" or "woe is me!" and can be used in a more dramatic context.

Other options:

* Боже мой! (Bozhe moy!) - This translates to "My God!" and can be used to express surprise, shock, or disappointment.

* Черт! (Chert!) - This is a slang term for "Damn!" and is not considered polite.

The best way to choose the right phrase depends on the situation and your relationship with the person you're speaking to.