基数词与序数词专项练习

基数词与序数词专项练习

一、知识归纳

①基数词变序数词的规律：

口诀：基变序，有规律。

一、二、三、特殊记，词尾字母t,d,d. (如：first, second, third)。

八减t,九去e,（如：eighth, ninth）, f 来把ve替。（如：twelfth）.

单词ty作结尾，ty变成tie(如：twentieth).

若是碰到几十几，只变个位就可以。（如：twenty-first）

②1-100的序数词：

1st--first；2nd--second；3rd--third；4th--fourth；5th--fifth；6th--sixth；7th--seventh；8th--eighth；9th--ninth；10th--tenth；11th--eleventh；

12th--twelfth；20th--twentieth；21st--twenty-first；22nd--twenty-second；29th--twenty-ninth；30th--thirtieth；31st--thirty-first；40th--fortieth；50th--fiftieth；60th--sixtieth；70th--seventieth；80th--eightieth；

90th--ninetieth；100th--hundredth

二、巩固练习：

①写出下列词的序数词形式。

1. one 2.two 3. six 4.five 5. nine 6.twelve 7.eight 8.twenty-one

②写出下列单词的基数词形式。

1.third 2.fourth 3.tenth 4.twentieth 5.nineteenth 6.thirty-first _

③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 .

④选择填空。

( )1. My cousin’s birthday in on the of October.

A. three B. first C. the second

( )2. What date is it 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