Have you already found a place to live

[Boris Tatarenko]

Let's pretend you know that a friend of yours is looking for a place to live. Perhaps she has been successful. You're asking her

1) Have you found a place to live yet?
2) Have you already found a place to live?

According to my grammar book we use "yet" only in questions and negative sentences; therefore the first sentence is correct. Is the second one grammatically correct? I'm under the impression that one might well hear it in spoken English.

 

[tedmc]

Both are common in spoken English. (2) suggests the person asking has heard something about the person having found a place.

 

[Raymott]

The obviously correct answer if this were an exam is 1. ted is right in that 2 is more likely if you have some reason to believe that your friend has found a place.
They are both common and grammatical, but they must reflect the situation. Maybe this is more pronounced in AusE, but if we want to know whether something has happened yet, we don't ask if it's already happened unless we have a reason.