Those is the plural form of that.

those的that的复数形式。

“These” is the plural form of “this.”

“these”是“this”的复数形式。

Notice, it's always in the plural, cards.

注意用复数，cards。

What is the plural of octopus?

章鱼的复数是什么？

The plural of octopus is octopuses.

章鱼的复数是 octopuses。

Saying the plural " heydays" is a little less common.

说复数就不那么常见了。

Now, the plural form changes at the end, okay?

复数形式只是在结尾有变化。

There are is the plural form of there is.

There are 是 there is 的复数形式。

Woman is the singular, but women is the plural.

Woman 是单数，women 是复数。

This is an exception to the plural noun rule in number2.

这是第2条规则的一个例外情况。

Always in the plural, and the table. It's always the table.

总是复数，还有 the table，这个不变。

There are is the plural form of there is and there's.

“There are” 是“there is”和“there's”的复数形式。

And yesterday, he repeated that statement just switching it to the plural.

昨天，他再次重申了他的态度，不过这次用的是复数。

Please note, I've used the plural verb in the first part.

请注意，我在第一部分使用了复数动词。

Then we would use the and the plural form of that family name.

我们会使用这个姓氏的复数形式。

If the question's in the plural, then it changes.

如果问题是复数，那么它就会改变。

It does not take an S in the plural form.

它的复数形式不带 S。

If the subject is plural, then we use the plural form of the verb.

如果主语是复数，那么动词就是复数。

Them, you must change it to the plural.

它们，你必须把它改成复数。

The plural form is different in the spelling at the end of the word, right?

这个词的复数形式在词尾的拼写上是不同的，对吧？