"Can I get some soy sauce?"
"Can I get some _?" is neither the most direct nor the most appropriate translation for "_をください."
____ , please.
Yeah, it's pretty strange that the English is a question, but the Japanese is a request.
Could you pass the soy sauce could also be 「醤油を取っていただけませんか?」or 「醤油をこちらにちょうだい。」