Fill in the Blanks Subjects and PredicatesOnline version Module One, Lesson Two by Dawn Rookey 1 predicate singular plural subject being verb The of a sentence is the who or what the sentence is about . The in the sentences tells what the subject is doing ( action verb ) or describes the subject condition of . For example , Sally is sad . That is a condition of the subject's being . " Is sad " is the predicate . Subjects and verbs can be , meaning one or , meaning more than one . If you have a singular subject , then you need a singular . If you have a plural subject , then you need a plural verb .