Can your student agree with these troublesome topics and verbs? Your student will decide which form of the verb to use in a sentence. 1. Group nouns can be considered a unit and therefore accept a singular verb. 4. Is not a contraction of no and should only be used with a singular subject. Don`t is a contraction of do not and should only be used with a plural meeting. The exception to this rule occurs in the first-person and second-person pronouns I and U. For these pronouns, contraction should not be used.. . .