ALL/MOST/SOME/NONE OF

They are used on having referred to a group of things
for expample:

All cars have wheels.

Some people are very unfriendly

Most tourists don't visit this part of the town

None of this money is mine. 

->all/most/some of + plural pronoun is followed by a plural verb.
Most of us/you/them believe this is wrong.
->none of + plural pronoum is followed by singular verb.
none of us/you/them is prepared to make such a sacrifice.