Задание 1. Поставьте предложения в отрицательную форму. К выделенным словам поставьте

1) He doesnt grant us a 3% discount for cash payment. For what does he grant us a 3% discount? 2)  You shouldnt have called your friend long ago. What should you have done long ago? 3) He didnt know what was wrong with the machine. Who knew what was wrong with the machine? 4) The manager wont be able to receive Mr. A. only in the afternoon. What will the manager be able to do to Mr. A. only in the afternoon? 5) I hadnt to sign this agreement only on Monday. What had I to sign only on Monday? 6) They have not to transport their products by rail. Who has not to transport their products by rail? 7) Participation in fairs doesnt help to promote our goods. What does participation in fairs help to do?