Quote Originally Posted by Romik View Post
What's you about? The last sentence is correct, in opposite yours, but just doesn't fit here with "Я ещё не был в Москве". "Но я знаю Москву как" would imply that you know it personally.
The original last sentence
Quote Originally Posted by Danila View Post
Я ещё не был в Москве. Но я знаю Москву большой город.
is incorrect. It does not contain any "как". It is not clear that the author implied such a grammar. Even if he did implied such a construction it does not fit the preceding sentence. So the only correct version. which fits the text is provided by Marcus and Alexsms.
Но я знаю, что Москва - большой город.