Ref. grammer.com, learneresl.net, parentingpatch.com
Pronouns replace nouns, to avoid unnecessary repetition of these words in a passage or sentence. The nouns replaced by the pronouns are called antecedents with specific functions in the sentence. It is thus clear the same functions of the nouns in the sentence are attributed to all the pronouns.
1.Noun phrase head: The pronoun replaces its noun as noun phrase head in the Subject and object positions./ He lives in New Delhi./ She believes in him./The teacher gave her a zero./etc.
2. Subject: The pronoun fits into the subject slot to determine concord with the finite verb. /Someone lives in this abandoned house./ She dreams about the safety of her lover./
3.Subject complement: Here, the pronoun is linked to the subject with the help of linking verb like be, seem, /Prosperity is mine despite the odds./It was I who instructed them to come./ The crying baby was he./
4. Direct object: The pronoun follows a transitive verb /The teacher likes Maths. He teaches it regularly./He sucks oranges a lot. He took some this morning./ He loves her so much./
5. Object complement:( noun or pronoun modifying the object)/ ‘He painted the bathroom this’.(parentingpatch.com)/This quarrel made the girl anything/
6. Indirect object: /The state granted him amnesty./The vehicle gave us trouble yesterday./ He offered everyone a drink./
7. prepositional complement: /The man worked for us till we found a solution/ He plucked oranges for me./His words sank deep in her/
8. Appositive: /That man, him, stole my purse. (parentingpatch.com)/A female student, you, should do this job better./
9. Introducers of adjectival clauses: The girl whose husband died came here yesterday