The ordinal number matching the number19 in a series 第十九在数列中与数字19相配的序数词
2.
The ordinal number matching the number90 in a series 第九十在数列中与数字90相配的序数词
3.
The ordinal number matching the number nine in a series 第九在数列中与数字9相配的序数词
4.
The ordinal number matching the number14 in a series 第十四一序数词，一系列数中的第十四个
5.
Know the difference between ordinal numbers and cardinal numbers 对比基数词和序数词的不同
6.
Know how to distinguish and use ordinal numbers and cardinal numbers 掌握基数词和序数词的用法。
7.
Now look at the numbers carefully ， try to find out the changing rules . please pay attention to the colorful words and letters （让他们注意观察彩色单词和字母，找出基数词变序数词的规律，允许他们用中文说。 ）
