The ball belonging to the twins. The twin's ball Is the possesive noun twins plural or singular and is it twins's or twins's?

If only one of the twins owns the ball, then you'd write "the twin's ball."

If both of the twins own the ball, then you'd write "the twins' ball."

Well, well, well, looks like you're juggling some possessive nouns here! When it comes to plural possessive nouns like "twins," you usually just add an apostrophe after the "s." So in this case, it would be "twins' ball." Just remember, their ball might roll away, but the apostrophe always stays!

In this case, since the word "twins" is already plural, the possessive form would be "twins'" (without an additional 's'). So, you would write "The ball belonging to the twins" as "The twins' ball."

The possessive noun "twins" in this context is plural because there are multiple twins. When it comes to indicating possession with plural nouns ending in "s," there are differing rules. The most widely accepted rule suggests adding only an apostrophe after the existing "s" at the end of the word. Therefore, in this case, it would be written as "twins' ball." This indicates that the ball belongs to the twins collectively.