A concept map about the Present Perfect and Past Simple designed to help students understand the difference between these two important English tenses. The map explains when to use the Present Perfect for past actions when the exact time is not specified, often with a connection to the present, and when to use the Past Simple for completed actions at a specific time in the past. It also presents how to form the Present Perfect with HAVE + past participle, together with affirmative, negative and interrogative forms and the difference between regular and irregular verbs. A useful English grammar summary for studying and reviewing.