Usage Examples Present Perfect

• I haven't noticed anything. -
• I haven't prepared anything. -
• Have you considered my offer? -
• They've attacked us. -
• Have you notified the police? -
• I've lost it! -
• Have you considered it? -
• What have you discovered? -
• Have you discovered it? -
• I have asked them. -
• You haven't recovered yet. -
• I've never been there! -
• I've never seen a baby. -
• Have you checked your e-mail? -
• I've found her. -
• I have signed it. -
• Have you written it? -
• Have I troubled you? -
• You have not considered the alternative. -
• Have you finished it? -