3. Поставьте предложения в вопросительную и отрицательную формы:
1. Physics is a study of non-living things.
2. The science deals with changes in composition.
3. These dictionaries are very useful.
4. He can spell all these words.
5. This was the teacher's last question.
6. She knows the answer to this question.
7. The lesson is over.
8. The teacher speaks English to the students.
9. Tom answered the teacher's question correctly.
10. Alice spoke loudly.