(共31张PPT)
2022年春人教PEP英语
五年级下册
When is the art show
Part B
Let's learn & Ask and write
Unit 4
Let's read
1st
2nd
3rd
4th
5th
Enjoy the song
My birthday is in January.My birthday is in January.
My birthday is in January.It’s on January 1st.
My birthday is in August.My birthday is in August.
My birthday is in August.It’s on August 5th.
Lead in
Do you like the song
What’s the song about
Birthday.
Lead in
Today,let’s learn the birthdays of Wu Binbin’s family!
Let's learn
She is an actress.
When is her birthday
It's on September 12th.
9月12日
简写：12th
twelfth
基数词：twelve
twelfth
基数词变序数词口诀：
“基”变“序”有规律，ve要用f替，末尾再加th.
How old is she
When is her birthday
It's on April 20th.
2010年4月20日
twentieth
twentieth
简写：20th
基数词：twenty
基数词变序数词口诀：
“基”变“序”有规律，整十先把词尾y改为ie,末尾再加th.
Is she beautiful
When is her birthday
It's on January 30th.
1月30日
thirtieth
简写：30th
thirtieth
基数词：thirty
基数词变序数词口诀：
“基”变“序”有规律，整十先把词尾y改为ie,末尾再加th.
He is a player.
How old is he
When is his birthday
It's on September 21st.
2005年9月21日
twenty-first
twenty-
first
简写：21st
基数词：twenty-one
基数词变序数词口诀：“基”变“序”有规律，表示“第几十几”，只变个位就可以。
He is a singer.
He's from China.
When is his birthday
23rd
twenty-third
It's on July 23rd.
7月23日
twenty-third
简写：23rd
twenty-
third
基数词：twenty-three
基数词变序数词口诀：
“基”变“序”有规律，表示“第几十几”，只变个位就可以。
twenty-third
twenty-first
thirtieth
twenty-first
thirtieth
twelfth
twentieth
twelfth
See&say
Sum-up
序数词
twelfth
twentieth
twenty-first
twenty-third
thirtieth
简写形式
12th
20th
21st
23rd
30th
注：
序数词的简写形式由阿拉伯数字加上序数词的最后两个字母构成
用英语表达日期时，一般由“月份+序数词的简写形式”来表示，如6月21日写成June 21st,读作June (the) twenty-first
Look and write
Sun. Mon. Tues. Wed. Thur. Fri. Sat.
1 2 3 4
5 5th 6 6th 7 7th 8 8th 9 9th 10 10th 11
11th
12 13 14 15 16 17 18
19 20 21 22 23 24 25
26 27 28 29 30 31
When is your birthday
It’s on March 21st.
Look and write
Name Date of birth
Mike March 16th
… …
… …
Group work
调查组内成员的生日，看哪一组同一月过生日的人数多，则获胜。
基数词变序数词方法口诀
基变序，有规律，后面th加上去。
在数词后面加th（发音为[θ]）。
four → fourth six → sixth
seven → seventh ten → tenth
eleven → eleventh thirteen → thirteenth
fourteen → fourteenth fifteen → fifteenth
sixteen → sixteenth seventeen → seventeenth
eighteen → eighteenth nineteen → nineteenth
Language points
one, two, three特殊变，first，second，third
八去t，九去e。整数中的y要变成ie
eight去掉t，nine去掉e。twenty去掉y变成twentieth
eight → eighth nine → ninth twenty → twentieth thirty → thirtieth
forty → fortieth fifty → fiftieth
sixty → sixtieth seventy → seventieth
eighty → eightieth ninety → ninetieth
Language points
f 来把ve替。
five和twelve的ve要变成f 。
five→ fifth
twelve→ twelfth
若是遇到几十几，只变个位就可以。
两位数或两位以上数字只变个位。
twenty-one → twenty-first
twenty-two → twenty-second
twenty-three → twenty-third
twenty-four → twenty-fourth
thirty-three→thirty-third
序数词前要加the
Language points
Exercise
我会排序
1._________ 2._________ 3.____________
4._____________ 5._________
twelfth
twentieth
twenty-first
twenty-third
thirtieth
书写小达人
Summary
(听、说、认读、写)词汇：
twelfth (12th)
twentieth (20th)
twenty-first (21st)
twenty-third (23rd)
thirtieth (30th)
Homework
熟读本课时单词并尝试背诵。
