Is it correct to use dashes in quotes?

[99bottles]

Do the same rules regarding dashes apply when quoting something?

For example, is this sentence correct? Or should I put a fullstop instead of a dash?

'If he catches us, it's all over -- he'll kill us,' he said.

 

[Tarheel]

If you're quoting something you want to quote it exactly. That's the rule here.

 

[jutfrank]

Yes, the same rules apply.

Remember that punctuation represents the way that people modify their speech with pauses, changes in intonation, emphasis, and other things like that. So it's especially important to use punctuation carefully and effectively when you're writing dialogue.