Usage Examples Present Perfect vs Past Simple

• I've known Sarah for five years. -
• Did your mother go to a doctor on Tuesday? -
• I didn't do it on my own. -
• I haven't bought a new computer yet. -
• Did we take this bus last time? -
• Who is the smartest person you have ever met? -
• What interesting foods have you eaten in your life? -
• Did you have a pet when you were a child? -
• We have just got back from our holidays. -
• My mum has lost her keys and cannot get into the house now! -
• Anna has met me today. -
• Mary has not started her essay yet. -
• My dad broke his leg last month. -
• Laura has never been abroad. -
• We went to Paris three months ago. -
• Have you ever met a celebrity? -
• It is the worst day I have ever had. -
• Where have you travelled lately? -
• I stayed home last night. -
• The teacher hasn't seen you this week. -