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Hi [A]

People is a collective nown if i am not mistaken. Do we consider it a plural nown or singular nown."Still people haven't or hasen't seen it yet". Please make some correction and let me know your valuable suggestions.

Thanking you

Yours trully, Himadri Roy
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First, noun, not nown and hasn't, not hasen't

People can be
1) the plural of person; persons exists but is rather formal
2) a word meaning something like nation, ethnic group, etc. with a plural peoples
Comments  
In general, [people] is perceived as a plural noun. So "Still people haven't seen it yet" is the orrect form.
 J Lewis's reply was promoted to an answer.