4.以“元音字母+y”结尾的名词，直接在词尾加-s .
5.以f或 fe结尾的名词，先将f或 fe变为v,再加-es.
6.以o结尾的名词,表示无生命事物的名词加-s, 表示有生命事物的名词加-es。
给下列可数名词加复数．
bird--birds
card-- cards lady-- ladies
orange--oranges ruler-- rulers photo--photos
class box watch brush
classes boxes watches brushes
3. 以“辅音字母+y”结尾的名词， 应改y为i，再加-es。
family families
comedy comedies
(喜剧)
4. 以“元音字母+y”结尾的名词， 直接在词尾加-s构成复数形式 。
句子单数变复数
1. This is a book.
These are books.
2. That is an eraser. Those are erasers.
3. It is a red apple. They are red apples.
4. I am a boy.
We are boys.
--What are those?
--They are English books.
backpacks
oranges
watches
pens
--What’re these ? --They’re … .
--What’re those ? --They’re … .
maps
cases
keys
单数
如 何 可数名词 变 化 ？
复数
规则变化 不规则变化
1.一般情况下，直接在词尾加-s 构成复数形式。
car cars
backpack backpacks
book books
name pen card ruler
names pens cards rulers
2. 以s, x, ch, sh等结尾的名词， 在词尾加-es构成复数形式。
leaf
(树叶)
wolf
(狼)
roof
(屋顶)
wives leaves wolves roofs
巧记：
“小偷”(thief)的“妻 子”(wife)用“刀子”(knife)
和“树叶”(leaf) 把“狼”(wolf)劈成两
6. 以o结尾的名词，有的加-s, 有 的加-es构成复数形式。
photo photos
名词单数变复数
What’s this in English?
It’s an apple.
What are these?
They are two apples.
--What’s this? --It’s a pen.
--What are these?
--They are pens.
--What’s that? --It’s an English book.
friend-- friends boy-- boys watch--watches
girl-- girls
case-- cases cat-- cats
wife-- wives
tree-- trees key-- keys
bed-- beds
hero--heroes family-families
dictionary--dictionaries question-- questions
leaf-- leaves
party-- parties cup-- cups
单数
பைடு நூலகம்this
–
that
–
I
–
you
–
he / she / it –
am / is
–
复数
these those we you
they are
boy boys day days
5. 以f或fe结尾的名词，先将f或fe 变成v，再加-es构成复数形式。
knife knives
half halves
“小偷”(thief)的“妻子”(wife)用“刀子”(knife) 和 “树叶”(leaf)把“狼”(wolf)劈成两“半”(half)。
wife (妻子)
5. He / She is a teacher. They are teachers.
6. What’s this ?
What’re these ?
复数句子变单数句子 These are dictionaries.
单数 This is a dictionary.
一般疑问句,并作肯定回答 Are these dictionaries ? Yes, they are.
划线提问 What are these ?
zoo zoos
(动物园)
tomato tomatoes (西红柿) hero heroes (英雄)
以o结尾的名词, 表示无生命事物的名词，词尾加-s, 表示有生命事物的名词，词尾加-es。
加-es的名词有: potato, tomato, hero
巧记:
英雄爱吃 土豆炖西红柿。
• Sum up: 1.一般情况下,直接在名词词尾加-s. 2.以s,x,sh,ch结尾的名词,在词尾加-es. 3.以辅音字母加y结尾的名词，要变y为i再加-es.