The document discusses the simple past tense of the verb "to be" in English. It provides the affirmative, negative, and interrogative forms of the verb for each subject pronoun. The affirmative form uses "was" for I, he, she, it and "were" for all other subjects. The negative form uses "wasn't" and "weren't". Questions are formed by placing the verb before the subject. Examples are given to illustrate the different forms and uses.