日語 Japanese Ask Questions Thread2 質問

If you have a question about the language, ask it and fellow 4channers might see it and answer it for you.

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

How do you know when 全然 is negative or positive? I asked someone and she wasn't too sure, and she said that old japanese 全然 is always negative, but the new one(?) can be positive or negative. Problem is, you can say stuff like only 全然 and nothing more and it can be taken negatively. So how do you know?