The apostrophe after the s of the plural noun brothers tells you that it is a possessive noun, a noun indicating that something in the sentence belongs to two or more brothers.
Examples:
My brothers' names are Mike and Max. (the names of the brothers)
The brothers' business is very successful. (the business of the brothers)
She made Sandwiches for her brothers' lunch.
The possessive form for the plural noun brothers-in-law is brothers-in-law's.Example: I had the work done at my brothers-in-law's body shop.
The word brother's is singular possessive. The plural possessive form is brothers'.
To form the possessive of a plural noun that ends with an s, place the apostrophe after the ending s: brothers'Example: My brothers' names are Jeff and Joe.
The possessive form of the plural noun brothers is brothers'.Example: The brothers' business is really doing well.
The possessive form of the plural noun brothers is brothers'.Example: My brothers' names are Jeff and Jack.
The plural form of the noun brother is brothers.The plural possessive form is brothers'.Example: The brothers' business is really doing well.
The possessive form of the word dictionary is dictionary's.
The three brothers' dogs.
The plural form is brothers-in-law.The plural possessive is brothers-in-law's.Example: Both of my brothers-in-law's careers are going very well.
The singular possessive form is word's, for example the word's definition.
possessive form of the word glass: glass'
The possessive form of the word "month" is "month's."