The document is from an English teacher providing an overview of using the past simple form of the verb "to be" in English. It discusses conjugating "to be" in the past tense for subjects including I, she, he, it, we, you and they. Examples are provided to illustrate using the past form "was" and "were" in sentences, as well as forming negative sentences using "wasn't" and "weren't". The document is teaching English as a second language students about using the correct past tense forms of the verb "to be".