名词复数构成的方法有规则的有：
(1)直接在名词后加s如orange—oranges; photo—photos;
(2) 以x, s, sh, ch 结尾的加es如：box—boxes; glass—glasses; dress–dresses; waitress—waitresses; watch—watches;peach--peaches
(3) 以辅音字母加y结尾的改y为i加es如：study—studies；library—libraries; hobby—hobbies; family—families;
(4)以f, fe结尾的改f, fe 为v＋es如：knife—knives; thief—thieves leaf–leaves
（5）以o结尾的加es如:mango—mangoes ； tomato--tomatoes; potato--potatoes
(6)不规则的有：man—men; woman—women; people—people; child—children