Present perfect 04 August 24, 2026 0 Aspects, Auxiliary Verbs, Grammar Exercises, Main Verbs, Past Participle Form, Perfect, Present perfect, Primary Auxiliary Verbs, Verb Forms, Verbs Change the sentences to negative. Do not use contractions. Results #1. She has been sick lately. enter answer here #2. We have known each other for a long time. enter answer here #3. I have tried to reach him. enter answer here #4. He has failed to get their attention. enter answer here #5. It has been easy. enter answer here #6. We have worked on this since last week. enter answer here #7. They have missed their chance. enter answer here #8. He has exercised this week. enter answer here #9. I have called her today. enter answer here #10. She has put on a black dress. enter answer here Previous Finish efleslonline exercisesonline quizzesPractice English