помогите пожалуйста)))
Поставьте предложения в вопросительной и отрицатель
ной формах.
1. We were able to read that article in the library. 2. Some students
will be permitted to take exams in December. 3. You have to
read this book. 4. We shall be able to skate in winter. 5. My friend
is to take part in the conference. 6. The students of our group had
to go to the plant last week. 7. They were allowed to continue their
research.