My 'is a possessive adjective.

my是个所有格形容词。

You often use the possessive adjective.

你通常使用的是所有格形容词。

Also, the possessive adjective yours / yours, e.g.

也请记住形容词所有格yours /你的。 例如：What was yours like?

In a sentence, a possessive adjective is always used before a noun.

在一个句子里，所有格形容词总是位于名词之前。

"His" can be either a possessive adjective or a possessive pronoun. Could you give us some examples?

既可作为形容词性的物主代词也能作为名词性的物主代词，你能给我们一些例子吗？