Pronouns are words we use in the place of a full noun.
1 – We use personal pronouns in place of the person, people or thing that we are talking about. They show person and number.
2 – It and There can be used as empty pronouns where there is no other subject to put in the subject position, that is, they can be used as “dummy subjects”.
3 – The following are demonstrative pronouns. This and That are singular; These and Those are plural. They are usually used to refer to things or ideas. The demonstrative pronoun takes the place of the noun phrase.
4 – We use interrogative pronouns to ask questions. Questions using these interrogative pronouns are called wh-question. Who and Whom can be used on their own. Whose, Which and What can be used on their own or with a noun head.
5.- A reflexive pronoun indicates that the person who is realizing the action of the verb is also the recipient of the action. We use it when we want to refer back to the subject of the sentence or clause. It is preceded by the adverb, pronoun, adjective, or noun to which it refers, and the antecedent must be located within the same clause
6 – Reciprocal pronouns are used when two or more people are acting in the same way towards the other, when something is done and given in return. Each other is used for two people; one another for more than two people.
7 – An indefinite pronoun does not refer to any specific person, thing or quantity. Pronouns ending in –one or –body are for people and those ending in –thing are for things. Those beginning with no- are for negative clauses.
8 – A relative pronoun is used to refer to nouns mentioned previously.
Who/whom → when we talk about people
Which → when we talk about things
Whose → instead of his/her or their
That →for people/things