A pronoun is a word that takes the place of a noun or refers back to a noun already mentioned.
Common pronouns include: he, she, it, they, this, that, their, his, her, which.
You must be very careful when using pronouns in order to be sure that your reader understands what your pronoun is referring to. (The word a pronoun refers back to is called the antecedent.)
Pronouns must agree in number:
1. When the store owner greets a customer, she always smiles.
(The noun store owner is singular, so the pronoun she must be singular. The sentence would be wrong if it read – “When the store owner greets a customer, they always smile.)
NOTE: The words everybody, anybody, anyone, each, neither, someone, a person, etc are all singular and should be replaced by singular pronouns.
1. Anybody can volunteer for the job if he or she is motivated enough.
( NOT: Anybody can volunteer for the job if they are motivated enough.)
Pronouns must agree in person:
Always use the pronoun that agrees with the form of “person” you are using. Person refers to: first person (I), second person (you), third person (he, she, they, it, etc.)
1. The man went to the store because he needed milk.
( NOT: The man went to the store because you needed milk.
Pronouns must avoid being vague in what they reference:
There are two common problems with vague pronouns. One occurs when there is more than one noun that the pronoun could refer to. The other occurs when a pronoun used refers to a word that is implied but not specifically stated.
1. After the teacher gave Susan the paper, she walked away angrily.
The problem here is the vague pronoun “she.” It creates a situation in which the reader can’t tell who walked away angrily – the teacher or Susan.
2. At UNR, they keep the grounds looking neat and tidy.
The problem here is the pronoun “they.” Who is this mysterious “they”? The pronoun is too ambiguous and unclear.
Adapted from Purdue University’s Writing