Usage Examples Present Perfect vs Past Simple

• Mary has not started her essay yet. -
• Have you ever met a celebrity? -
• I didn't do it on my own. -
• I've known Sarah for five years. -
• My grandmother read this newspaper yesterday. -
• The teacher hasn't seen you this week. -
• Who is the smartest person you have ever met? -
• My sister was born in Italy. -
• Has James just left? -
• My brother has been to Mexico three times. -
• John liked my new book. -
• They haven't lived here for years. -
• Emily didn't see you yesterday. -
• My dad broke his leg last month. -
• Have you ever been to Ukraine? -
• We went to Paris three months ago. -
• I didn't go to the university last week. -
• Has Anna passed this exam already? -
• What is the most beautiful place you have ever been to? -
• It hasn't rained a lot this year. -