Why isn't there a "hain" at the end of the sentence?
For present-tense sentences with नहीं, the है can be omitted.
Ham aj ja nahi rahe is incorrect?
Same question. I'm sure I followed this earlier
It should be accepted. You can report if you see the sentence again.
Why isn't the nehi put last?
नहीं goes either right before or after the verb ( जा).
I've tried putting नहीं after the verb, and it marked me as incorrect. Full answer: हम आज जा नहीं रहे.