Usage Examples Present Perfect vs Past Simple

• I haven't bought a new computer yet. -
• I've known Sarah for five years. -
• I had pancakes for breakfast. -
• Has your mother done the shopping already? -
• Jack has seen this film before. -
• John liked my new book. -
• Did they go to the university with you? -
• It is the worst day I have ever had. -
• The teacher hasn't seen you this week. -
• Where did you work five years ago? -
• Did you have a pet when you were a child? -
• My brother has been to Mexico three times. -
• My brother didn't play hockey at school. -
• Did your mother go to a doctor on Tuesday? -
• Anna has met me today. -
• Why did Anna go to Manchester two weeks ago? -
• Rosie didn't bake this cake, I did. -
• I have already finished my project. -
• It hasn't rained a lot this year. -
• You've spilt the water and now the floor is wet. -