seventieth
eightieth
ninetieth 15
若是遇到几十几， 只变个位就可以
twenty-one thirty-two forty-three fifty-four sixty-five seventy-six eighty-seven ninety-eight
twenty-first thirty-second forty-third
8
Let’s review
ten sixty
thirty
forty
seventy
One hundred
eighty
fifty
ninety
twenty
9
10
7
6 5
4 3 2 1
11
7
6 5
4 3 2 1
12
ห้องสมุดไป่ตู้数词
eight
five ninefifth
•one ---first
two---second
序数词：first, second, third, fourth, fifth,…ninth,…twelfth, thirteenth,… nineteenth, twentieth, twenty-first， …thirtieth…hundredth.
19
Practice:
•December is the _t_w_e_l_f_t_h_ month of the year. •Monday is the _s_e__c_o_n_dday of the week. •English is spoken by most people as their _f_i_r_st___
twenty-first (21st) twenty-second (22nd) twenty-third (23rd) twenty-fourth (24th) twenty-fifth (25th) twenty-sixth (26th) twenty-seventh (27th) twenty-eighth (28th) twenty-ninth (29th) thirtieth (30th)
and sixty-one 95,680
ninety-five thousand, six hundred and eighty
7
基数词记忆口诀：
基数词，表数量，一至十二单独记， 十三、十四至十九，teen尾莫忘记， 二十、三十至九十，单词末尾有ty 若是遇到几十几，连词符连就可以。 百位、十位加and，没有十位就连个。
seventy twenty - seven
eighty
twenty - eight twenty - nine
nineteen hnuinnderteyd
5
挑战1
请默写1--12的基数词
6
Look and Practice
625 six hundred and twenty-five
8,961 eight thousand, nine hundred
ten----tenth twelvthei-r-d--(t3wrde)lfth
13
挑战2
请默写1--12的序数词
14
twenty thirty forty
fifty sixty
seventy
eighty
ninety
几十， y变ie, 再加th
twentieth thirtieth fortieth fiftieth sixtieth
十几:teen 几十:ty
几十几：
eleven
twenty twenty -one
twelve
thirty twenty - two
thirteen fourteen fifteen sixteen seventeen eighteen
forty fifty sixty
twenty - three twenty - four twenty - five twenty - six
fifty-fourth
sixty-fifth
seventy-sixth eighty-seventh
ninety-eighth 16
缩写：1st 2nd 3rd 4th
first 1st second 2nd third 3rd fourth 4th fifth 5th sixth 6th seventh 7th eighth 8th ninth 9th tenth 10th
1
数词
2
1.什么是数词？ 表示数量或顺序的词叫做数词
2.数词的分类 数词分为基数词和序数词。 表示数量的数词叫基数词；
表示顺序的数词叫序数词。
3
基数词
eight
one two
five
nine
three
ten
four
six
seven 4
one two three four five six seven eight nine ten
17
thirty-first (31st)
序数词记忆口诀： 序数词，很容易，前面用the表顺序， 基变序，有规律，词尾加上th, 一、二、三，特殊记，词尾字母t,d,d。 八加h, 九减e，f来把ve替，ty须变tie。 若是遇到几十几，变化个位就可以。18
基数词: one ,two , three, …hundred.
eighth
ninth
three---third
four---fourth
fivee-ig--hfitftt•hhonetwelve sixn-i-nft-isweritsexthltf(h1tsht)
seven---s•evtewnoth
eighst-e-c-oenigd h(2thnd)
nine---nin• ththree eleven---eleventh
eleventh 11th twelfth 12th thirteenth 13th fourteenth 14th fifteenth 15th sixteenth 16th seventeenth 17th eighteenth 18th nineteenth 19th twentieth 20th
language in the USA, Great Britain, Australian,
and Canada. •The Games of the t_w__e_n_t_y_-_n_i_n_t_h_ Olympic in 2008