1.可數(shù)名詞的復(fù)數(shù)形式要加S There are trees on both sides of the road
2.名詞的所有格要加'S 例如 Mary's sister is twelve years old
3.姓氏后面加S表示一家人,例如 THE WHITES 懷特一家人
4.一般現(xiàn)在時(shí),第三人稱單數(shù),動(dòng)詞要加S,例如 He plays basketball on every Sunday afternoon.
6.分?jǐn)?shù)詞,當(dāng)分子大于1時(shí),分母要加S,例如 三分之一是 one third,但是三分之二就是 two thirds