The document discusses the past simple form of the verb "to be" in English. It lists the subjects and their corresponding forms - "I/he/she/it was" and "we/you/they were". It provides examples of positive sentences using these forms. It then lists the subjects again and their negative forms with "not" - "I/he/she/it was not" and "we/you/they were not". It also shows contracted negative forms like "I wasn't".