Note: In this example, the subject of the sentence is the pair; That is why the verb must correspond to this. (Because scissors are the subject of the preposition, scissors do not affect the number of verbs.) In the example above, the plural corresponds to the actors of the subject. In these constructions (called expansionist constructions), the subject follows the verb, but always determines the number of the verb. 1. Subjects and verbs must match in number. It is the rule of the cornerstone that constitutes the background of the concept. Subjects and verbs must correspond in number (singular or plural). So, if a subject is singular, its verb must also be singular; If a subject is plural, its verb must also be plural. 6. When two subjects are connected by “and”, they usually need a plural form. 1. A sentence or clause between the subject and the verb does not change the number of the subject.