(1):Are the boys playing football in the park
(2):Is Mr.Zhang your teacher
在变一般疑问句时助动词和主语交换位置.
(3):There aren't any watches on the table.
在变否定句时在be动词后面加not,而some是用在肯定句和在征求对方回答时用的,any是用在否定句里的,因此把some换成any .