Question

Nobody here _________(knows\know)to play monopoly or Chinese checkers
.......plsgive reason and it belongs to subject verb agreement

Answer 1

nobody knows to play monopoly or chinese checkers
here we use 'knows' because we usually add 's' with the verb when the subject is singular

Answer 2

Nobody here knows to play monopoly or Chinese checkers. Here too, Nobody is a singular verb, and singular nouns always take up plural nouns( ie. nouns with 's' after them). So 'knows' will be used when nobody is the subject.