Nominal possessive pronoun = corresponding adjective possessive pronoun+noun

The specific differences are as follows:

1, followed by different words

Adjective possessive pronouns must be followed by nouns. Adjective possessive pronouns cannot be used alone, but must be used with nouns to express all.

Is that your bike? Is that your bike?

Yours is generally not the same word, it has a complete meaning.

I broke my pen. Please give me yours. My pen is broken. Give me your pen.

2. Different from adjectives.

When adjective possessive pronouns and adjectives modify nouns together, they should be placed before adjectives.

His English book, his English book, their friends in China and their friends in China.

Nominal possessive pronouns are equivalent to "adjective possessive pronouns+nouns" and must be used in a specific language environment, that is, the nouns to be omitted have been mentioned by everyone.

My bike is new, but yours is old. My bike is new, but yours is old.

3. Different usages

If you use the possessive pronoun of the adjective before the noun, you can't use modifiers such as articles (a, an, the) and demonstrative pronouns (this, that, these, those).

Is this yours? Desk. This is your desk.

It is a possessive pronoun equivalent to a noun, which means "something of someone" It is used to replace the known object that has been pointed out, without adding a known noun after it.

I broke my pen. Please give me yours. My pen is broken. Give me your pen.