Помогите надо эти предложения написать в отрицательной и вопросительной форме

1my sister likes her mother very much

2there is book on the desk

3there are computers in the classroom

4his grandmother cleans the room every day

1) my sister don't like her mother very much. My sister likes her mother very much?

2) There is no book on the desk. Is there a book on the desk?

3) There are no computers in this class. Are there computers in the classroom?

4) His grandmother does not clean the room every day. Does his grandmother clean the room every day?