The document discusses the present perfect tense in English. It connects past events or actions to the present. The present perfect uses helping verbs like "have" or "has" plus the past participle form of the main verb. It is used for actions that began in the past and continue in the present, actions that happened at an unspecified time before now, or recently completed actions that influence the present. Examples are provided to illustrate the formation and use of the present perfect tense compared to the past simple tense. Common mistakes in present perfect tense are also identified and corrected.