Переведите предложения, обращая внимание на времена группы Perfect. Образуйте отрицательные и вопросительные формы.
1. Bob has left his tickets at home.
2. She had finished her test when we came.
3. The teacher will have corrected our compositions by the end of the week.
4. The secretary had sent all documents by 2 o’clock.
5. My friend has been absent this week.