SUBJECT VERB RULE #2 Two or more SINGULAR subjects connected by or (or not) act as a singular composite subject and therefore take a singular verb to get along. Don`t is a contraction of do not and requires a plural theme. What form of verb to use in this case? Does the verb have to be singular to correspond to a word? Or does the verb have to be plural to match the other? These matching rules do not apply to verbs used in the simple past tense without auxiliary verbs. In the present, nouns and verbs form plurals in the opposite way: the nouns ADDieren ein s with the singular form; Verbs REMOVE the s from the singular form. Regular verbs written in the present tense when converted to the plural skip the use of s at the end of each verb. In the past tense, however, verbs do not change: rule 1. .