Make the sentences negative and interrogative. 1) Helen has been translating this article for an hour. 2) We have been listening to the latest news for five minutes. 3) She has been ironing since 5 o'clock. 4) Ben has been taking a shower for a quarter of an hour. 5) A cat has been watching a bird for ten minutes. 6) Tom's cousin has been doing karate for twelve years. 7) We have been walking around the Zoo since 11 o'clock. 8) The participants have been filling in the questionnaires for twenty minutes. 9) Mike has been searching for the information since last Tuesday. 10) Den has been driving for six hours now.

olegiwanow    1   03.12.2021 10:14    7