Не ! только 1. look, susan (to look) so exhausted. she (to prepare) for exam since morning. 2. next year is ted and amy's 25th wedding anniversary. they (to be married) for 25 years. 3. i (to lose) my key. can you help me look for it? 4. everything is going fine. we (not to have) problems so far. 5. it (to be) my first time in an aeroplane. i (to be) very nervous because i (not to fly) before.

1. Look, Susan looks so exhausted. She has been preparing for exam since morning.
2. Next year is Ted and Amy's 25th wedding anniversary. They will have been married for 25 years.
3. I have lost my key. Can you help me look for it?
4. Everything is going fine. We have not had problems so far.
5. It is my first time in an aeroplane. I am very nervous because I have not flown before.
или It was my first time in an aeroplane. I was very nervous because I had not flown before.