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seven _______ (序数词)

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用序数词填写下面的表格。
one 1.______       eleven 11.______                 
two 2.______        twelve 12.______       
three 3.______        thirteen 13.______       
four 4.______        fourteen 14.______       
five 5.______        fifteen 15.______       
six 6.______        sixteen 16.______       
seven 7.______        seventeen 17.______       
eight 8.______        eighteen 18.______       
nine 9.______        nineteen 19.______       
ten 10.______        twenty 20.______       

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写出下列基数词对应的序数词。
1. one ________ 
5. five _______  
9. nine _______  
2. two _______  
6. six _______   
10. ten _______ 
3. three ______
7. seven ______ 
11. eleven             
4. four _______  
8. eight ______                            
12. twelve _______

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小博士:仔细观察下面的基数词和对应的序数词的区别和变化,你会发现这种变化是有规律的,你能归纳出来吗?请根据规律填出所缺的基数词和序数词,并特别注意黑体字的词。

one

first

eleven

eleventh

twenty-one

twenty-first

two

second

twelve

twelfth

twenty-two

twenty-second

three

third

thirteen

thirteenth

twenty-three

twenty-third

four

fourth

fourteen

fourteenth

twenty-four

______

five

fifth

fifteen

______

twenty-five

twenty-fifth

six

sixth

sixteen

sixteenth

twenty-six

twenty-sixth

seven

______

seventeen

seventeenth

twenty-seven

twenty-seventh

eight

eighth

eighteen

eighteenth

twenty-eight

twenty-eighth

nine

ninth

nineteen

nineteenth

twenty-nine

twenty-ninth

ten

tenth

twenty

twentieth

thirty

thirtieth

thirty-one

thirty-first

fortieth

ninetieth

hundred

hundredth

 

forty

thousand

thousandth

 

ninety

million

millionth

 

我找到规律了!请看:

1  英语序数词1~19,除first,second,third等特殊形式外,其余的一般是在相应的基数词后加-th构成。

2  有几个序数词加-th时拼法不规则,要注意。如fifth,________ ________ ________。

3  十位整数的序数词的构成方法是先将其基数词的词尾“ty”中的“y”改为“i”,再加“-eth”。如________。

4  基数词“几十几”变成序数词时,只需将个位数变成序数词,十位数不变。如________。

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掌握数词的用法非常重要,请做下面的练习,写出下列数词的序数词形式。

(1)one ________ two ________

three ________

(2)four ________ six

seven ________ ten

(3)five ________ twelve ________

(4)eight ________ nine ________

(5)twenty ________ thirty ________

forty ________ fifty ________

(6)sixty-one ________

seventy-two ________

eighty-three ________

ninety-five ________

one hundred and six ________

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