Английский язык, 8 класс Change the sentences into negative ones.
1. Granny has been watering the flowers for half an hour.
2. The kitten has been running about the garden for ten minutes.
3. Nancy has been helping her mother since childhood.
4. The students have been writing the dictation for 25 minutes.
5. The weather has been changing slowly.
6. The workers have been building the stadium for a year.
7. We have been taking part in the sports competitions since the primary school.
8. The girls have been gathering apples since 6 am'.