Subjects and verbs must agree in two ways: number (singular or plural) and person (first, second, or third). These two general rules hold through all the different subject/verb guidelines. As a rule, plural subjects end in -s and plural verbs do not end in -s.
When words fall between a subject and verb, the singular/plural state of the subject is sometimes confusing. Always make sure you are matching the verb to the subject and not to one of the words between the two.
Scenario 1: Words fall between subject and verb
Example - Six community libraries in Singapore were formed in 2005.
Common Mistake: Mistaking “Singapore” for the subject would make it seem as if the verb should be “was formed.”
