поставьте предложения в вопросительную и отрицательную формы:
1)these are hospitals
2)we have some maps
3)there are some people in the pus
4)he cleans the black board with the duster
5)the pupils are working in the library now
6)his sister can cook dinner

These are not hospitals. Are these hospitals?
We not have some maps. Do we have some maps?
There are not some people in the pus. Are there not some people in the pus?
He not cleans the black board with the duster. Do he cleans the black board with the duster?
The pupils are not working in the library now. Are the pupils working in the library now?
His sister can't cook dinner. Can his sister cook dinner?