Напишите следующие предложения в отрицательной форме 1. he was able to win a great victory. 2. she could go there. 3. i can swim. 4. they had to work in the evening. 5. i could see them after work. 6. they had to be back early. 7. there barrels must be empty

1. He was not able to win a great victory.
2. She could not go there.
3. I can not swim.
4. They did not have to work in the evening.
5. I could not see them after work.
6. They did not have to be back early.
7. There barrels must not be empty