1. I have been trying to get into contact with them for a long time, but now I have given it up as hopeless.
2, My shortsighted uncle has lost her spectacles. We have looked for them everywhere but we can't find them.
3, She has been of great help to us since she has been living for such a long time with us.
4. Have you ever worked as interpreter? — Yes, that is what I have been doing for the last five months.
5. Have they made up their quarrel? — I don't know. I only know that they haven't been on speaking terms since September.
6. Our pilot has been asking for permission to take off for ten minutes already, but he has gotten no answer yet.
7. A skillful photographer has been helping me with the development of summer films for two weeks, but we have only developed half of them.
8. I have known them since we met at Ann's party.
9. You have opened the door at last. I have been ringing for an hour at least, it seems to me.
10. Look! The typist has been talking all the time, she has already missed several words.
