However, a prepositional sentence inserted between the subject and the verb sometimes complicates the agreement. If parts of a subject are connected by or not, the verb corresponds to the part closest to it. If the next part is singular, the verb is singular. If the next part is plural, the verb is plural. An agreement can be difficult if you write long, complex sentences in which the subject and verb are not side by side. To make editing easier, try reading sentences aloud. We often hear when something is wrong. You can also search for a subject-verb match by asking which subject turns off the verb to find the subject, and then juxtaposing the subject and the verb. Don`t forget to check if the subject is used as singular or plural or if multiple nouns are linked to form a topic.