Already is used to say a positive sentence while till is for negative sentence. For example: Suppose a girl ask you "can I be your girlfriend, do you have any girlfriend?" you can reply in one of the following two ways. 1. Sorry. I have already one girlfriend. 2. Of course. I have no girlfriend yet.

Hi! "Already" is used for saying that something happened sooner than expected: She has already gone on holiday. / I'm already there. We use"yet" mainly in negative and interrogative sentences. Have you finished your homework yet? - I haven't finished it yet.

I have done this already I have not done this yet (=I haven't done this yet) I have already gone to the store I haven't gone to the store yet

'Yet' is for questions and negatives: Question: Have you finished your homework yet? Negative answer: No, I haven't finished it yet. Positive answer: Yes, I've already finished it.