Помогите пожалуйста решить номер 2.

1)Is physics a study of non-living things?
Physics it isn't a study of non-living things
2)Does the science deal with changes in composition?
The science doesn't deal with changes in composition
3)Are these dictionaries very useful?
These dictionaries aren't very useful
4)Can he spell all these words?
He can't spell all these words
5)Was it the teacher's last question?
This was not the teacher's last question
6)Does she know the answer to his  question?
she doesn't know the answer to his  question
7)Is the lesson over?
The lesson isn't over
8)Does the teacher speak English to the students?
The teacher doesn't speak English to the students
9)Did Tom answer the teacher's question correctly?
Tom didn''t answer the teacher's question correctly
10)Did Alike speak loudly?
Alike didn't speak loudly