1.I'm afraid I have forgotten my book at home.
2 has the Secretary came yet?
3. have you ever been to Italy?
4. they have already informed me about the accident
5. Kevin has already left for Moscow
6. he hasn't received any letters from her this week.
7. I haven't heard from him since he left.
8.I haven't seen Tom for 5years.
9. have you had a holiday this year?
10.we have seen some good films recently.
11.they have waited for you for half an hour.
12. Mom has had a headache since she came from the theatre.
13. Alan has worked in the bank for a year.
14.Granny has been I'll for a week.
15.have you ever ridden a horse?
16. he has already done this experiment.
17. he has just passed the exam
18. have you ever read this book?
19. the article has just translated by the students..
20. the scientific conference hasn't start yet.
1) я останусь дома, если пойдет дождь.
2) я пишу вам, чтобы сообщить, что буду в Глазго на следующей неделе.
3) я не уверен, поедут ли они завтра в деревню.
4) Напишите мне, когда вы начнете свою новую работу.
5) спросите ее, когда она закончит рисовать картину.
6) он нам, когда придет.
7) мы пойдем кататься на лыжах, если пойдет снег.
8) моя мать купит мне новое платье, если у нее есть деньги.
9) я не знаю, наденут ли они завтра джинсы.
10) если она купит новый модный шарф, она его наденет.
Объяснение: