七年级英语名词单数变复数专练课件

class s box x watch ch brush sh
classes boxes watches brushes
3. 以“辅音字母+y”结尾的名词， 变y为i，再加-es。
family families y
strawberr y
(草莓)
strawberries
. 以o结尾的名词，有生命的加4. es, 无生命的加-s
表示有生命事物的名词加-es。
把下列可数名词变为复数形式．
orange--oranges ruler-- rulers photo-- photos friend-- friends boy-- boys watch-- watches girl-- girls case-- cases tree-- trees key-- keys bed-- beds hero--heroes family- families dictionary-- dictionaries question-- questions cups party-- parties cup--
--What’s that? --It’s an English book.
--What are those?
--They are English books.
backpacks
watches
oranges
pens
--What’re these ?
--They’re … .
--What’re those ?
photo zoo (动物园)
photos zoos tomato tomatoes hero (英雄)
heroes
• 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. 4.以o结尾的名词,表示无生命事物的名词加-s,
Those are erasers.
They are red apples. We are boys. What’re these ?
5. He / She is a teacher. They are teachers.
复数句子变单数句子
These are dictionaries.
单数
This is a dictionary.
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 three pens.
--They’re … .
maps
cases
keys
单数
可数名词
如 何 变 化 ？
复数
规则变化
不规则变化
1.一般情况下，直接加-s
ruler
rulers
backpack backpacks book books
name
names pens cards
pen
card
ruler
源自文库
rulers
2. 以s, x, ch, sh等结尾的名词， 在词尾加-es。
一般疑问句,并作肯定回答 Are these dictionaries ? Yes, they are. 划线提问
What are these ?
单数
this –
复数
these
those
that
I you
–
– –
we
you they
he / she / it
am / is
–
–
are
句子单数变复数
1. This is a book. These are books.
2. That is an eraser.
3. It is a red apple. 4. I am a boy. 6. What’s this ?