Rule 1. Subject pronouns are used when the pronoun is the subject of the sentence. You can remember subject pronouns easily by filling in the blank subject space for a simple sentence.
Example: ___ did the job.
I, he, she, we, they, who, whoever, etc., all qualify and are, therefore, subject pronouns.
Rule 2. Subject pronouns are also used if they rename the subject. They will follow to be verbs, such as is, are, was, were, am, will be, had been, etc.
Examples:
It is he.
This is she speaking.
It is we who are responsible for the decision to downsize.
Rule 3. This rule surprises even language watchers: when who refers to a personal pronoun (I, you, he, she, we, they), it takes the verb that agrees with that pronoun.
Correct: It is I who am sorry. (I am)
Incorrect: It is I who is sorry.
Correct: It is you who are mistaken. (you are)
Incorrect: It is you who's mistaken.
Rule 4. In addition to subject pronouns, there are also object pronouns, known more specifically as direct object, indirect object, and object of a preposition (for more detail, see the definition of a verb in the Finding Nouns, Verbs, and Subjects section). Object pronouns include me, him, herself, us, them, themselves.
Examples:
Jean saw him.
Him is the direct object of the verb saw.
Give her the book.
The direct object of give is book, and her is the indirect object. Indirect objects always have an implied to or for in front of them: Give [to] her the book. Do [for] me a favor.
Are you talking to me?
Me is the object of the preposition to.
Rule 5. The pronouns who, that, and 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.
Example: He is the only one of those men who is always on time.
The word who refers to one. Therefore, use the singular verb is.
Sometimes we must look more closely to find a verb's true subject:
Example: He is one of those men who are always on time.
The word who refers to men. Therefore, use the plural verb are.
In sentences like this last example, many would mistakenly insist that one is the subject, requiring is always on time. But look at it this way: Of those men who are always on time, he is one.
Rule 6. Pronouns that are singular (I, he, she, everyone, everybody, anyone, anybody, no one, nobody, someone, somebody, each, either, neither, etc.) require singular verbs. This rule is frequently overlooked when using the pronouns each, either, and neither, followed by of. Those three pronouns always take singular verbs. Do not be misled by what follows of.
Examples:
Each of the girls sings well.
Either of us is capable of doing the job.
Neither of them is available to speak right now.
Exception: When each follows a noun or pronoun in certain sentences, even experienced writers sometimes get tripped up:
Incorrect: The women each gave her approval.
Correct: The women each gave their approval.
Incorrect: The words are and there each ends with a silent vowel.
Correct: The words are and there each end with a silent vowel.
These examples do not contradict Rule 6, because each is not the subject, but rather an adjunct describing the true subject.
