This document provides instruction on using singular and plural verbs in English sentences. It explains that singular verbs like "is", "am", "does", and "has" are used with singular subjects. Plural verbs like "are", "do", "were", and "have" are used with plural subjects, except "have" is only used with plural subjects "we" and "they". Examples are given of sentences using these different verbs in the singular and plural forms.