Say the same in a different way.

1. Have we just received the SOS signal from an unknown ship?
2. Have the sailors scrubbed the deck lately?
3. Has the ice-breaker already conducted the cargo ship Gotland to the port?
4. Have they visited the Kremlin today?
5. Have we studied how to navigate sailing boats?
1. We have not just received the SOS signal from an unknown ship.
2. The sailors have not scrubbed the deck lately.
3. The ice-breaker has not  conducted the cargo ship Gotland to the port yet.
4. They have not visited the Kremlin today.
5.We have not studied how to navigate sailing boats.

1. Yesterday I put five apples into the fruit bowl. Where  are they now?

— I haven't eaten them. Will you  bring some more tomorrow?

— Yes, if you don't make noise when granny is sleeping.

2. Have you ever been to the Hermitage?

3. What was Nick doing when you rang him up yesterday?

— He was playing the piano. He told me that he had already written his composition.

4. Why is she  sleeping now? It is too early. She never sleeps at this time.

5. Are you going to the library tomorrow? — No, I have already been to the library this week. I was there on Monday. As a rule, I go to the library every Wednesday. But yesterday I didn't go there, because I was reading the book. I am reading it now. I'll go to the library on Saturday if I have finished the book by that time. 6. As soon as I receive a letter, I shall go to Moscow. 7. By six o'clock we had already made arrangements to take the early train.