1. Pronoun/ Antecedent Agreement

2. Review: What’s a Pronoun?
A pronoun is a word used to stand for (or take the place of) a noun.
A word can refer to an earlier noun or pronoun in the sentence.
        Example:
                  
We do not talk or write this way.  Automatically, we replace the noun Lincoln's with a pronoun.  More naturally, we say
                    

3. What’s an Antecedent?
The pronoun his refers back to President Lincoln.  President Lincoln is the ANTECEDENT for the pronoun his. 
An antecedent is a word for which a pronoun stands.  (ante = "before")
The pronoun must agree with its antecedent in number.
Rule: A singular pronoun must replace a singular noun; a plural pronoun must replace a plural noun.
                

4. Rule #1
A phrase or clause between the subject and verb does not change the number of the antecedent.
            Example:
                    

5. Rule #2
Singular indefinite pronoun antecedents take singular pronoun referents.

6. Rule #3
 Compound subjects joined by and always take a plural referent.
                    Example:
                         

7. Rule #4
 With compound subjects joined by or/nor, the referent pronoun agrees with the antecedent closer to the pronoun.
                 
   Example #1 (plural antecedent closer to pronoun):
                          
                
Example #2 (singular antecedent closer to pronoun):

8. Rule #5
Collective Nouns  (group, jury, crowd, team, etc.) are singular.