For example, as the sentence above shows, we even use a plural verblage according to a singular noun. This is because “dogs and cats” are treated as plurals. 1. Group nouns can be considered a unit and therefore accept a singular verb. Have you ever received “subject/verb”, like an error on a paper? This handout will help you understand this common grammar problem. The subject in a sentence is typically the thing or person acting. The theme below, for example, is “cat,” since the cat is the thing that drives the action. And because there is only one cat, we use the singular verb “is” so that the verb and the subject match: these rules of conformity do not apply to verbs used in the simple past without a useful verb. In the present, nouns and verbs form the plurary in the opposite way: addisants substants un s to the singular form; Verbs Remove the s from the singular form.