Iii. преобразуйте следующие предложения в вопросительные и отрицательные: 1. the teacher found some old textbooks a few days ago. 2. the students worked in the library last week. 3. he was a fine actor. 4. the explanation of the rule was quite clear to t he class. 5. the students took an active part in the conversation. 6. the student concentrated on the writer's central idea.

1. The teacher didn't find some old textbooks a few days ago.

2. The students didn't work in the library last week.

3. He wasn't a fine actor.

4. The explanation of the rule wasn't quite clear to the class.

5. The students didn't take an active part in the conversation.

6. The student didn't concentrate on the writer's central idea.

1. Did the teacher find some old textbooks a few days ago?

2. Did the students work in the library last week?

3. Was he a fine actor?

4. Was the explanation of the rule quite clear to the class?

5. Did the students take an active part in the conversation?

6. Did the student concentrate on the writer's central idea?