Usage Examples Present Perfect vs. Present Perfect Continuous

• How long has Nataly been calling you? -
• Mary has been to Canada twice. -
• I haven't seen Lisa today. -
• I haven't been swimming since May. -
• I haven't been playing hockey for a long time. -
• We haven't been to Sweden yet. -
• I have been working here for three months. -
• I have been writing emails for three hours. -
• Luke has written four books. -
• There has been an accident. -
• They have been waiting for us for thirty minutes. -
• What is the tastiest food you have ever tried? -
• Charles has been teaching at the university since August. -
• Has your cousin graduated from the university yet? -
• I have never had a pet. -
• Has Max been exercising lately? He looks great! -
• Have you ever met Helen? -
• They have never met Alex. -
• My sister has not come back yet. -
• How long have you been sitting here? -