Today's English lesson

From the American Heritage Book of English Usage:Let's Come To AnAgreement HereA pronoun must agree with its antecedent in person, number, and gender. Most people have heard this grammatical rule at some time in their lives. An antecedent, of course, is a noun or pronoun referred to by a pronoun. Usually an antecedent comes before its pronoun (as in Dave played his guitar this morning) but