日語 Japanese Ask Questions Thread2 質問

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Japanese - Ask questions thread
http://dis.4chan.org/read/lang/1174719097/l50

>>339
さすが(name) is used in a kind of "I knew you could it!" way, or maybe "just what we'd expect from you!". I fail at explaining it though, I never really understood さすが when it was explained to me, it just became clear once I saw it a few times in different contexts. It's one of those akward words, IMO.

You're basically right with なきゃ, it's shortened from ～なければ(ならない/いけない/だめ). People often leave out the negative afterwards because it's strongly implied and not really necessary when you're being casual like that. You'll also see sentences ending in なくちゃ or ないと just the same.