1.105 position in clause

Object pronouns are used as the object of a clause.

They can be the indirect object of a clause.

They can also be the object of a preposition.

1.106

Object pronouns can also be used after link verbs. For example, you can say 'It was me', 'It's her'. However, in formal or written English, people sometimes use a subject pronoun after a link verb. For example, 'It was I', 'It is she'.

For more information on link verbs, see paragraphs 3.127 to 3.182.