名词性物主代词(nominal possessive pronoun):
单数形式:mine(我的xx),yours(你的xx),his /hers /its(他的xx、她的xx、它的xx)one's(某人的xx);
复数形式:ours(我们的xx),yours(你们的xx), theirs(他们的xx)。
造句:Look at the two pencils. The red one is yours and the blue one is mine.
May I use your pen? Yours works better.