(共15张PPT)
英语语法微课
序数词
一，二，
三，四
基数词
第一，第二，第三
序数词
ten
基数词
tenth
序数词
six
sixth
twenty-seven
twenty-seventh
1基数变序数，一般 加th
eight
基数词
eightth
序数词
twenty-eight
twenty-eight
2已经有t，只加h
eighth
twenty-eighth
nine
基数词
nineth
序数词
thirty-nine
thirty-ninth
3有不发音的e，去掉e
nin
e
ninth
1基数变序数， 后 加th
2已经有t，只加h
3去掉不发音的e
thirty-eight,
four ,
eighteen,
twenty-nine,
fifty-six
thirty-eighth,
fourth,
eighteenth,
twenty-ninth,
fifty-sixth
five
基数词
fiv
序数词
twelve
twelv
4 v变成f
fif
e
fifth
twelf
twelfth
4 v变f
3去掉不发音的e
fifty-five,
fifteen ,
twelve,
fifty-fifth
fifteenth
twelfth
twenty
基数词
序数词
forty
fortie
5 y变成ie
twentie
twentieth
fortieth
one
基数词
first
序数词
two
second
6 特殊变化
three
third
1st
2nd
3rd
变化测一测
five
fifty-five,
fifty ,
twelve,
three
fifty-eight
thirty-nine
one
fifth
fifty-fifth
fiftieth
twelfth
third
fifty-eighth
thirty-ninth
first
变成序数词
two
eight
nine
twenty
thirty
twenty-one
million
second
eighth
ninth
twentieth
thirtieth
twenty-first
millionth
用单词的适当形式填空
1，This is my _____(nineteen) birthday.
2,She came ____(three)in the 100 meters.
3, Two ___ of the land is covered with trees.
4,Although I failed for four time, I will give it a _____ (five) try.
5, What is the __(two)longest river
答案
1，This is my nineteenth birthday.
2,She came third in the 100 meters.第三名
3, Two fifths of the land is covered with trees.五分之二，分母用序数词
4,Although I failed for four time, I will give it a fifth try. 又一
5, What is the second longest river 顺序
口诀记一记
基变序，
有口诀。
一二三特殊记，first，second，third
八加h，九去e，
ve要用f换，
整十变y为ie，尾巴th别忘记，表示几十几，变动个位就可以。
