一、名词复数规则

1.一般情况下，直接加-s，如：

book-books, bag-bags, cat-cats, bed-beds 

2.以s. x. sh. ch

结尾，加-es，如：

bus-buses, box-boxes, brush-brushes, watch-watches

3.以“辅音字母+y”结尾，变y为i, 再加-es，如：

family-families, strawberry-strawberries 

4.以“f或fe”结尾，变f或fe为v, 再加-es，如：

knife-knives 5.

不规则名词复数：

man-men, woman-women, policeman-policemen, policewoman-policewomen, mouse-mice child-children foot-feet,.tooth-teeth fish-fish, people-people, Chinese-Chinese, Japanese-Japanese 

写出下列各词的复数

Iwatch _______child _______photo ________diary ______ day________ foot________ book_______ dress________tooth_______ sheep______box_______strawberry_____peach______sandwich______dish_______bus_______man______ woman_______