I am in the Negation lesson. Why is it not "gidmiyoruz". What lesson was this taught in?
The consonant mutation only happens when followed by a vowel. Notice that the infinitive is gitmek and not gidmek :)
Is the sentence "We are here, not going" wrong in English? Do we always use the subject in the second part of the sentence?
In order to drop the repeated elements in English, the two parts of the sentence should have a parallel structure. So you can say "We are here, not there" or "We are coming, not going", but "We are here, not going" is unnatural and your listener would have to puzzle out what you meant.
'bura' means 'this place' and doesn't indicate locative structure. So it requires a locative case marker and by this way it turns into 'burada'. But 'here' means both 'in this place' and 'this place' according to context so it doesn't require a locative construction.