This chapter discusses the simple past and present perfect tenses in English. It provides information on their positive, negative, and interrogative forms as well as notes on usage. The simple past tense refers to completed events in the past, whether single or repeated, while the present perfect tense refers to events that started in the past but have relevance to the present. Examples are given of constructing sentences in the simple past and present perfect tenses, along with their negative and interrogative forms.