Grammar Agreement Questions Medium
Agreement with compound possessives depends on whether the possessive noun is plural or singular. When the possessive noun is singular, the agreement is made with the last noun in the compound. For example, in the phrase "John and Mary's car," the agreement is made with "car" because it is singular. Therefore, it should be written as "John and Mary's car."
On the other hand, when the possessive noun is plural, the agreement is made with both nouns in the compound. For instance, in the phrase "the boys' and girls' toys," the agreement is made with both "boys" and "girls" because they are both plural. Thus, it should be written as "the boys' and girls' toys."
In summary, agreement with compound possessives depends on the number (singular or plural) of the possessive noun, and the agreement is made accordingly with either the last noun or with both nouns in the compound.