Video - Past simple VS Present perfect

Do you know the difference between Past Simple and Present Perfect? The past simple is used when we describe an action that started and finished at a specific time in the past, whereas the past perfect is used to describe an action that started in the past and continues to the present time. The past simple can be used with phrases relating to finished time, such as: yesterday, last week, last month, in 1999, three days ago The present perfect can be used with phrases relating to unfinished time, such as: this week, today, this year Already, yet and just are usually used with the present perfect tense, but in North American English they can also be used with the simple past tense. TIMESTAMPS 00:00 - Introduction 00:11 - Diagnostic test 03:32 - Explanation 04:28 - Present Perfect 06:26 - Past Simple