Pronouns: Pronouns #1 (Personal Pronouns)

In traditional, formal grammar, subject
pronouns are used after BE:

This is he.
Was it I?

In conversational grammar, object pronouns
are more common:

This is him.
Was it me?

Object pronouns are used for direct objects,
indirect objects, and objects of prepositions:

I saw him / her / it / them / you yesterday.

I gave the message to him / her / them / you (or
I gave him / her / them / you the message).

She bought a gift for him / them / you / me / us
(or She bought him / them / you / me / us a gift).

They were standing near (next to, beside,
behind, near, in front of, etc.) me / us / you /
him / her / it.

Possessive pronouns are used alone, not
with nouns:

Are those keys yours / his / hers / ours?
No, they aren't mine / his / hers / ours.

Is this his house?
No, it's theirs / mine / his / hers / ours.

Possessive adjectives (my, your, his, her, its,
our, their) are not the same as possessive pronouns.