可数名词有单复数形式，不可数名词通常没有复数形式。表一个人或事物用单数，表一个以上的人或事物用复数。
| 情况 | 构成方法 | 例词 |
| 一般情况 | 加 -s | map – maps car – cars book-books apple-apples |
| s,ss,x,ch,sh等结尾 | 加 -es | bus – buses class - classes box – boxes watch - watches dish-dishes |
| -f或-fe 结尾 | 将-f和-fe变ves | wife-wives leaf – leaves knife – knives thief – thieves half-halves life – lives 记忆口诀：妻子用树架小刀将贼和狼劈成2半结束它们的生命 |
| 元音字母+ y结尾 | 直接加-s | boy-boys day-days monkey – monkeys holiday — holidays toy-toys 记忆口诀：男孩和猴子天天在节假日玩玩具和钥匙 |
| 辅音字母+ y结尾 | 变y为ies | baby—babies story—stories city-cities family-families hobby-hobbies |
| 辅音字母+ O结尾 | 一般加 -es | hero — heroes tomato – tomatoes potato – potatoes mango-mangoes 记忆口诀：黑人英雄喜欢吃西红柿、土豆还有芒果 |
| 元音字母+ O结尾 | 加-s | zoo - zoos photo-photos bamboo – bamboos radio – radios piano-pianos 口诀：（动物园）（照片）中的（袋鼠）可以用（竹子）听（收音机）和弹（钢琴） |
| 单复数同形名词 | 保持不变 | deer-deer sheep-sheep fish-fish people-people Chinese-Chinese English Japanese-Japanese Vietnamese- Vietnamese Swiss Portuguese Lebanese 记忆口诀：草原上吃草两种动物：鹿和绵羊，水里游的鱼； 中日英 三国家人；越，瑞，葡，黎 4四国家人 |
| 表示某国人的名词 | 直接加s | human-humans German-Germans Russian-Russian American-Americans Italian-Italians Indian-Indians Canadian-Canadians Australian-Australians Swede-Swedes(瑞典人) |
| 无连字号复合名词 | 以后面名词变 | mooncake-mooncakes bookcase-bookcases（书橱）armchair-armchairs（轮椅） housewife-housewives gentleman-gentlemen bookshelf-bookshelves birthday-birthdays blackboard-blackboards greenhouse-greenhouses |
| 第一个名词是man,woman的 | 两者都要变复数 | man teacher-men teachers（男老师） woman doctor---women doctors（女医生） 男人/女人做定语修饰名词，两者都需要变复数 |
| 以f,fe结尾特殊名词 | 直接在词尾加s | roof-roofs（屋顶）chief—chiefs (首领)serf—serfs（农奴）reef-reefs（礁石/暗礁）hoof-hoofs（马蹄）cliff-cliffs（悬崖）gulf—gulfs (海湾)belief-beliefs (信仰/信念)proof -proofs（证据） 记忆口诀：（屋顶）上的（首领）踩着（礁石）和（马蹄）带领（农奴）在（悬崖）(鸿沟)上找到了(信仰)和(证据). |
| 其它特殊变化的名词 加ren或者加en | man---men woman-women child—children goose-geese 鹅tooth-teeth牙齿 foot-feet 脚 mouse-mice老鼠 记忆口诀：（男人/女人a改e）(牛孩子们加en/ren)（老鼠寄生将 m,l后面改为ice） |
1)写出下列名词的复数形式。
1、bag _______ 2、orange _______ 3、family _______ 4、wish _______ 5、shelf ______
6、knife _______ 7、key _______ 8、baby _______ 9、tooth _______ 10、foot _______
11、woman ______ 12、sheep _______ 13、Japanese _______ 14、potato _______ 15、radio _______
16、child _______ 17、fish _______ 18、photo _______ 19、bus _______ 20、watch ______
2)填入所给名词的正确形式
1、 I have two （knife)
2、There are many here. （box)
3、There are many on the road. （bus)
4、A few are drawing on the wall. （boy)
5、The are playing football now. （child)
4)请用括号中名词的复数形式填空
1 、Look at those _______.（child)
2、 I can see a __________ standing near the door. （policeman)
3、 Do you want some ________ for dinner? （potato)
4、 In autumn, you can see a lot of _______ on the ground.（leaf)
5、 He has two _______.One is blue , the other is yellow.（box)
6 、Two ________ live in this building .、 family )
语法填空
1、It brings youth ________(leader)worldwide and gives them an opportunity to engage with policy-makers and civil society representatives to discuss the Sustainable Development Goals.
2、The ________(advantage)of learning an instrument are far greater than just the pleasure of enjoying an enjoyable sound.
短文改错
（2018全国Ⅰ）
1、Last winter when I went there again, they had a big separate house to raise dozens of chicken。
（2018 全国Ⅱ）
2、After supper, we would play card games of all sort in the sitting room。
（2018 全国Ⅲ）
3、The classroom is a place for learning and that includes leaning from textbooks, and mistake as well.
（2017 全国Ⅰ）
4、The instructor kept repeating the word, “Speed up!” “Slow down!”
（2017 全国Ⅱ）
5、Besides, they often get some useful informations from the Internet.下载本文
