regex - Find if the sentence does not contains specific words -

i have regular expression find if sentences contains specific words

my query is:

(?=.*hello)(?=.*hi)(?=.*hey).*

but want check if sentence not contains words

i have tried:

(?=.*((?!hello).))(?=.*((?!hi).))(?=.*((?!hey).)).*

but not works

how should build query?

example:

this query should return true when sentence is:

hi, how you?

and must return false when sentence is:

hi hello hey ..

thanks in advance,

if problem match string if 3 words/patterns don't appear in string together, here simpler solution problem:

^(?!(?=.*hello)(?=.*hi)(?=.*hey)).*

or alternative solution (by de morgan's law):

^(?:(?!.*hello)|(?!.*hi)|(?!.*hey)).*

(not(a , b , c) equivalent not(a) or not(b) or not (c))

note scans pattern many times number of words checked, , again runs permutation problem if want check whether k out of n words appear in string.

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