This is that man’s house.

Singular Form for the noun man: Man.

Plural Form: Men.

plural is men. if the men possess it(eg, they men’s bathroom) then it’s still plural

if it’s man’s, then it’s the same, but it’s still singular (that man’s jacket)

yeah, so basically mAn is singular and mEn is plural, even with ” ‘s “

RE:
is the word man's plural or singular?
help

Or wait…Maybe it’s not. Like; “Man’s bast friend.” That’s plural. Or, “Man’s plight with nature.” Plural. I think it’s a trick question.

That’s the man’s shirt.

The plural of “man” is “men”.

A plural of man/man’s is men.

You can also say “the man’s there” which means “the man is there” in which case “man’s” is a conjunction of “man is”

Man’s can never be used as a plural word, it is grammatically incorrect.