Rule number one:

Pronouns that are singular require singular verbs i.e

I, he, she, everybody, everyone, anyone, anybody, no one, nobody, someone, somebody, each, either, neither

For example:

1. Each of the girls sings well.
2. Either of us is capable of doing the job.
3. Neither of them is available to speak right now.

Rule number two:

If two people possess the same item and one of the joint owners is written as a pronoun, use the possessive form for both.

For example:

Incorrect: John and my home

Correct: John's and my home

Incorrect: him and John's home

Correct: his and John's home

Rule number three:

When 'who' refers to a personal pronoun (I, you, he, she, we, they), it takes the verb that agrees with that pronoun.

For example:

Incorrect: It is I who is sorry.
Correct: It is I who am sorry. (I am)

Incorrect: It is you who is mistaken.
Correct: It is you who are mistaken. (you are)

Rule number four:

A pronoun in the nominative form should be compared with the same form of the pronoun.

For example:

1. He is better than I.

2. I respect you more than him. (Two objectives are compared)

Rule number five:

We should use the personal pronouns in the order of 231 i.e second person, third person, first person.

For example:

Incorrect: I, he and you are to finish it.
Correct: You, he and I are to finish it.

Rule number six:

However, the order 1,2,3 is also possible when we admit guilt i.e first person, second person, third person.

For example: I, you and he have committed the sin.

Rule number seven:

When nouns are joined by 'and'

-If they refer to the same person, then pronoun for them should be singular.
-If they refer to a different person, then pronoun for them should be plural.

For example:

Incorrect: The Manager and Principal of the college told their vision statement.
Correct: The Manager and Principal of the college told his vision statement.

Incorrect: Ali and Ahmed are boasting about his rich father.
Correct: Ali and Ahmed are boasting about their rich father.

Rule number eight:

When a sentence starts with 'each' or 'every' and two singular nouns are joined by 'and', then we should use singular pronoun only.

For example:

Incorrect: Every dog and horse has lost their tail.
Correct: Every dog and horse has lost its tail.

Rule number nine:

The reciprocal pronouns 'Each other' and 'one another' are used as follows:

Each other- for two persons

One another- for more than two persons

For example:

1. Two sisters love each other.
2. Five brothers hate one another.

Rule number ten:

The verbs given as follows are followed by either an 'object' or a 'reflexive pronoun'.

Hurt, cheat, introduce, prostrate, present, absent, satisfy, prepare, enjoy, avail of

For example:

1. I introduced her to the Principal. (Her=object)

2. I introduced myself to the Principal. (Myself=reflexive pronoun)

3. He enjoyed the party. (Party=object)

4. He enjoyed himself at the party. (Himself=reflexive pronoun)

Rule number eleven:

The pronouns 'who, that, which' become singular or plural depending on the subject. If the subject is singular, use a singular verb. If it is plural, use a plural verb.

For example:

1. He is the only one of those men who is always on time.
2. He is one of those men who are always on time.

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