A pronoun must match the number of its antecedent. In other words, if the antecedent is singular,the pronoun must also be singular.If the antecedent is plural, the pronoun must also be plural. Few people make mistakes when matching a pronoun with a noun antecedent. However, sometimes a pronoun is the antecedents frequently result in a number mismatch between pronoun and antecedent. In Lesson 12, you learned about singular pronouns. Here is the list again.