Is mouse's a plural possessive noun?

Answer 1

No, the noun 'mouse' is a singular noun, a word for one creature.

The plural form is mice, a word for two or more of these creatures.

The plural possessive form is mice's.

A possessive noun indicates that something in the sentence belongs to that noun.

A noun that does not end with an s forms its possessive by adding an apostrophe s ('s) to the end of the word.

A plural noun that does end with s forms its possessive by just adding an apostrophe (') to the end of the word (cats' or dogs').

Example sentences:

There was a mouse digging in my flower pot. (singular)

I found a mouse's nest under the stairs. (singular possessive)

The most famous mice are Mickey and Minnie. (plural)

The mice's cages must be cleaned each morning. (plural possessive)

Answer 2

No, the word mouse's is the singular possessive form.

The plural form for the noun mouse is mice; the plural possessive form is mice's.