Yours
Yours is a second-person possessive pronoun in modern English. It refers to something that belongs to the person or people being addressed and functions as a stand-alone pronoun rather than a determiner. When describing ownership before a noun, English normally uses the determiner your (as in your book). The form yours is used when the noun is not stated or when ownership is asserted without naming the object, as in “Is this yours?” or “The decision is yours.”
Yours often appears in letter closings, in phrases such as “Yours sincerely” or “Yours truly.” These are
Origin and form: “Yours” developed from the pronoun you with the possessive suffix -s and has been
Notes: In standard modern English, yours is used for both singular and plural addressees. It should appear
See also: Your, Yourself, Yours truly, Possessive pronouns, English pronouns.