Is it my and her or mine and her?

It’s very similar to [pronoun]mine. (It’s very similar to my scarf.) That’s not [determiner]their house….Pronouns: possessive (my, mine, your, yours, etc.)

personal pronoun	possessive determiner	possessive pronoun
I	my	mine
you (singular and plural)	your	yours
he	his	his
she	her	hers

Do you say my or mine?

As you rightly note, my is a possessive adjective and mine is a possessive pronoun. So, this means you use my where you already have a noun (such as question) and want to indicate ownership. Like with all pronouns, you use mine in place of another noun when it’s understood what’s being discussed.

Is it yours and mine or your and mine?

Either “your and my” or “yours and my” is very likely to be folded up into “our” in normal usage, so their usage is maybe more influenced by similar constructions. I would say the preference for “yours and my” is based on the similarity to the more commonly-used “yours and mine”.

How do you say hers and mine?

Or ‘mine car’? No, you would say her car, and my car; so her and my car. The apostrophe would translate to ‘her is,’ which makes no sense in this case. Yes, apostrophes are used for possessive case (Tim’s car), but ‘hers’ and ‘mine’ already denote possessive (the plural form is ‘their’).

When can we use hers?

language note: Hers is a third person possessive pronoun. You use hers to indicate that something belongs or relates to a woman, girl, or female animal. His hand as it shook hers was warm and firm. He’d never seen eyes as green as hers.

How do you use mine yours his hers?

In the sentence, mine is a possessive pronoun that replaces my book. In the sentence, yours is a possessive pronoun that replaces your book….English Grammar Rules.

Subject	Possessive Pronouns
I	Mine
You	Yours
He	His
She	Hers