How should you punctuate oh no the bus has gone?

There are a few ways to punctuate "Oh no, the bus has gone!" depending on the emphasis you want to convey:

* "Oh no, the bus has gone!" (This emphasizes the exclamation of "Oh no")

* "Oh no! The bus has gone." (This emphasizes the fact that the bus is gone)

Both are grammatically correct, and the choice depends on the context and the emotion you want to express.