In Pimsleur I'm told to say ほしいんですが, for "I want." I may have put in an extraい though. Anyways, I understand that the んです makes it more polite or less direct, right? What's the が there for? Is it just part of the んです construction? On the About.com page, and on some other places I've looked they just say to use んです. When do we use が at the end of a sentence in a situation like this?
Thanks!
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