there are 58 students in my class. 改为一般疑问句,用be there句型回答,否定回答和肯定回答也要

Are there 58 students in your class?
Yes, there are.
No, there aren't.thereis ariverinthefaist。 这个呢Is there a river in the faist?Yes, there is.No, there isn't.thereAresomebooksinheshelf呢Are there any books in the shelf?Yes, there are.No, there aren't.