Usage Examples Present Perfect vs Past Simple

• I haven't bought a new computer yet. -
• Has James just left? -
• I had pancakes for breakfast. -
• The teacher hasn't seen you this week. -
• Did your mother go to a doctor on Tuesday? -
• My grandmother read this newspaper yesterday. -
• Emily didn't see you yesterday. -
• I have already finished my project. -
• Has Rachel ever studied Hindi? -
• Mary has not started her essay yet. -
• My sister was born in Italy. -
• Who did you meet at the party yesterday? -
• What interesting foods have you eaten in your life? -
• I've known Sarah for five years. -
• Where did you work five years ago? -
• Did they go to the university with you? -
• When did Alice move to Portland? -
• My grandfather did not work at a bank. -
• Rosie didn't bake this cake, I did. -
• Have you ever been to Ukraine? -