You can't use numbers with them at all.

你不能在它们之前加任何的数词。

Oh! Clever! Playing on the use of cardinal numbers as euphemisms for bodily functions.

你！用基数词做文章来委婉表达人体机能。

And fiftieth is the correct way to write the ordinal number.

而 fiftith 才是序数词的正确写法。

You can't use articles like 'a' or 'an' with them and can't use numbers.

你不能用冠词比如'a' or 'an'修饰它们，数词也不可以。

When you're ordering things, so when ordinal numbers like second, fifth, are used as adjectives.

当你在给某些事物排序时，那么时序数词像是第二，第五，作为冠词使用。

All of the other ordinal numbers end in a TH.

所有其他以TH结尾的序数词。

Ordinal numbers are numbers that show the order of things.

序数词表示的是事物的顺序。

You'll see a number up here, it'll be an ordinal number.

大家会看到数字出现在里，它会是一个序数词。

You will learn how subjects such as ordinal numbers and sentence fragments help describe the events and results of the competitions.

你将了解如何使用序数词和句子成分述比赛和结果。

Ronnie's not taking this because " vocabulary" is what we see in English is uncountable.

因为“词汇” 是我们在英语中看到的不可数词。

Ordinal numbers refer to the order or position of something in a list.

序数词指的是列表中某事物的顺序或位置。

" All" can come before articles, possessives, demonstratives, and numbers.

“All” 可以位于冠词、所有格、指示词和数词之前。

I found words that are countable and uncountable, but that's  somewhat different.

我发现了可数词和不可数词，但有些不同。

We use cardinal numbers almost every day.Look at the numbers below.

我们几乎每天都在使用基数词。请看下面的数字。

Turm to pages 141-142 for more ahout cardinal and ordinal numbers.

翻到第141至142页，了解更多关于基数词和序数词的内容。

For instance, the subject of a sentence can be realized by a noun, pronoun, numeral, infinitive, etc.

例如，句子的主语可以由名词、代词、数词、不定式等实现。

I was late for class yesterday morning. That was the second time I had been late this week.

我昨天早上上课迟到了。已经是我本周第二次迟到了。语法提示：一般过去时，序数词的用法，定语从句，过去完成时。

Talk with your partner about your home and family, using cardinal numbers.

与你的伙伴谈论你的家庭和住所，使用基数词。

I got my first ever computer on my 18th birthday. I was on cloud nine when I got it.

在我十八岁生日那天，我得到了人生中第一台电脑。当我得到它的时候，我高兴得不得了。语法提示：一般过去时，序数词的用法，状语从句。

Write a short text about your family life, using both cardinal numbers and ordinal numbers.

写一篇关于你家庭生活的短文，同时使用基数词和序数词。