Nouns that have two pieces such as glasses, scissors or pants require multiple obstructions. 3. Look for the real sentence theme and choose a verb that matches that. As in this example, the subject is the singular book, the verb must also be singular. Composite subjects can act as a composite subject. In some cases, a composite subject poses particular problems for the subject/verb compliance rule (+s, -s). This sentence refers to the individual efforts of each crew member. The Gregg Reference Manual provides excellent explanations of subject-verb correspondence (section 10:1001). 7. The titles of individual entities (books, organizations, countries, etc.) are always singular. Key: subject = yellow, bold; verb = green, underline the subjects and the verbs must correspond in number (singular or plural).