小升初核心语法突破--2.序数词
朗文英语新飞跃leap 2A Unit 1 (the first floor; the second floor...)
序数词
表示顺序先后的词，即“第几”叫序数词。
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基数词 |
序数词 |
说明 |
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1 |
one |
1st |
first |
1-3序数词为独立单词 |
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2 |
two |
2nd |
second |
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3 |
three |
3rd |
third |
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4 |
four |
4th |
fourth |
4-19 序数词在其基数词的尾部加-th *为特殊变化。 |
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5 |
five |
5th |
*fifth |
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6 |
six |
6th |
sixth |
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7 |
seven |
7th |
seventh |
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8 |
eight |
8th |
*eighth |
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9 |
nine |
9th |
*ninth |
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10 |
ten |
10th |
tenth |
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11 |
eleven |
11th |
eleventh |
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12 |
twelve |
12th |
*twelfth |
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13 |
thirteen |
13th |
thirteenth |
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14 |
fourteen |
14th |
fourteenth |
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15 |
fifteen |
15th |
fifteenth |
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16 |
sixteen |
16th |
sixteenth |
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17 |
seventeen |
17th |
seventeenth |
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18 |
eighteen |
18th |
eighteenth |
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19 |
nineteen |
19th |
nineteenth |
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20 |
twenty |
20th |
twentieth |
20-90整十位数的序数词，将相应基数词词尾的y变成ie，再加-th |
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30 |
thirty |
30th |
thirtieth |
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40 |
forty |
40th |
fortieth |
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50 |
fifty |
50th |
fiftieth |
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60 |
sixty |
60th |
sixtieth |
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70 |
seventy |
70th |
seventieth |
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80 |
eighty |
80th |
eightieth |
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90 |
ninety |
90th |
ninetieth |
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21 |
twenty-one |
21st |
twenty-first |
21-99非整十数的序数词，由“十位数基数词-个位数的序数词”组成。 |
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22 |
twenty-two |
22nd |
twenty-second |
|
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23 |
twenty-three |
23rd |
twenty-third |
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25 |
twenty-five |
25th |
twenty-fifth |
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27 |
twenty-seven |
27th |
twenty-seventh |
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29 |
twenty-nine |
29th |
twenty-ninth |
|
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100 |
one hundred |
100th |
one hundredth |
第一百、第一千、第一百万分别在其基数词后加th。 |
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1000 |
one thousand |
1000th |
one thousandth |
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|
1,000,000 |
one million |
1,000,000th |
one millionth |
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口诀：
基变序，有规律;
一二三，特殊记，
词尾各是“t，d，d”; first, second, third，
th 四上起 fourth
八去“t”，九减“e”， eighth, ninth
“f”来把“ve”替; fifth，twelfth
若是遇到整十数，“y”则变成“ie”; twentieth
若是遇到几十几，只变个位就可以 thirty-first
小升初中，序数词相关的知识点
A.日期的表达
-What’s the date today? -It’s October 12th.
-What day is it today? -It’s Friday.
你能在1分钟内圈出所有的月份单词吗?
时间年月日的表达：
1. “月+日+年”，月日和年之间用‘逗号’隔开
如：August the second, 2003 可缩写为August 2nd，2003 (2003年8月2日)。
2. “日+月+年”，日月和年之间用‘逗号’隔开
如：the tenth of May, 2003 可缩写为10th May，2003 (2003年5月10日)。
B.给某些事物编号
例：Lesson One=the first lesson
C.有关分数表示法。
分子是基数词，分母是序数词。当分子大于1时，分母就用复数。
例：I’ve read one-fifth of the books.
I’ve finished three-fifths of the words.
D.序数词+形容词的zui高级
例：the second longest river in the world
E.基数词
1--19的表达
整十
三位数的表达
四位数的表达
成千上万
时间表达
倍数的表达
......
练习题
写出下列基数词的序数词形式。
1. one ______________
2. two ______________
3. three ______________
4. five ______________
5. eight ______________
6. nine ______________
7. twelve______________
8. twenty ______________
9. thirty-one ____________
10. one hundred ______________
用英语写出下列日期(两种表达方式)。
1. 3月2日_________ _________
2. 1月12日_________ _________
3. 11月31日_________ _________
4. 6月15日_________ _________
5. 7月3日_________ _________
单项选择。
( ) 1. ----What day is it today?
----It’s __________
A. Tuesday B. June 13th.
C. July August
( ) 2. We’ll finish __________ before the first test.
A. Lesson tenth B. Tenth lesson
C. Lesson the tenth D. the tenth lesson
( ) 3. May is _______ month of ______ year.
A. five…the B. fifth…a
C. the five…the D. the fifth…a
( ) 4. Mr. Brown is _______ teacher from Oxford University to visit China.
A. the two B. second
C. the second D. two
( ) 5. What’s the date today? It’s _______.
A. January the seventh
B. January seven C. the seven January
填空，每空一词。
1. Tom is the ____________(one)child of his family.
2. My birthday is on the ____________ (three)of April.
3. Jack is the ____________ (twenty) students in the line.
4. New Year’s Day is the day of each year.
5.The Spring Festival is usually in the or month of the year.
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