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英语基数词和序数词的
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英语中基数词变序数词的变化规律
一、二、三，特殊记(first,second,third)，
加th从4起，
八少“t”(eighth)，九去“e”(ninth)，
“ve”要用“f”替，(five, twelve)(five---fifth,twelve---twelfth)
见“y”变成“i”和“e”，词尾加上“th”(twenty-twentieth，
若是遇到几十几，只变个位就可以(twenty-one----twenty-first)
基数词和序数词的练习题
一、写出下列词的序数词
1. one 2.two 3. six 4.five 5. nine
6.twelve 7.eight 8.twenty-one
二、写出下列单词的基数词
1.third 2.fourth 3.tenth 4.twentieth 5.nineteenth
6.thirty-first _
三、根据句子意思填空。
1. Children’s Day（儿童节） is on the of June（六月）.
2. There are months（月）in a year(年).
3. Teacher’s Day(教师节) is on the of September（九月）.
4. Three plus(加) six is .
四、选择填空。
( )1. My cousin’s birthday in on the of October.
A. three B. first C. the second
( )2. What’s the date today? It’s of April.
A. twelfth B. the 12th C. 12th
( )3. There are days in a week.
A. the seven B. seventh C. the seventh D. seven
( )4.Sunday is the day of a week.
A. one B. first C. second
( )5. Twenty-eight minus(减)six is .
A. the twenty- second B. twenty-two C. twenty- second
( )6. Four plus(加) is twelve.
A. seven B. eight C. nine
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