This is known as the possessive case.

这就是所有格。

Okay, so that section on the possessive case should now be clear.

好的，所有格的部分就清晰了。

Second, they can act as determiners — words that mark nouns — in the possessive case.

其次，它们可以作为限定词——标记名词的词——以所有格形式使用。

Well first I'm going to be talking about the possessive case, the genitive case, where apostrophes show possession or a relationship between two things.

首先讲解一下所有格，省字符表示的是两种事物之间的所属关系。

So if you look at Will's on it's own it could be showing the possessive case or it could be showing a contraction of the verb, to be.

所以说，如果你看到Will's单独出现那可能是表示所有格，也可能是表示be动词的缩写。