Verbs agree with their subjects in number. (singular or plural) Problems arise when writers do not understand the difference between singular verb forms and plural verb forms or between singular nouns and plural nouns. End in “s” Should be used with only singular subjects Singular subjects can be substituted with he, she, or it Examples of singular verb forms: is, has, shows Do not end in “s” Should be used with only plural subjects Plural subjects can be substituted with the plural pronoun they Examples of plural verb forms: are, have, show Add an –s or –es to the verb when you’re writing about a he, she, or it. Incorrect: A politician need to be honest to get elected. Correct: A politician (he) needs to be honest to get elected. Do not add an -s or -es to the verb when you are writing about a they (any group of two or more). Incorrect: These complicated instructions really confuses me. Correct: These complicated instructions (they) really confuse me. Incorrect: There are a number of ethnic stereotypes that causes discrimination. Correct: There are a number of ethnic stereotypes that cause discrimination. Incorrect: Much of the support that Mike has come from his classmates. Correct: Much of the support that Mike has comes from his classmates. You must distinguish between singular and plural nouns: Incorrect As a woman, I am concerned about heart disease and breast cancer being the primary killer of American women. Correct As a woman, I am concerned about heart disease and breast cancer being the primary killers of American women. Incorrect Several guest were invited to the Legends Ball. Correct Several guests were invited to the Legends Ball.