把下面的句子改成一般疑问句,并作否定回答

一般疑问句就是把主语和谓语的次序调换一下,然后加问号就成了.
肯定回答是 yes ,主语和谓语
否定回答是 No ,主语和谓语的否定式,
如果句子的谓语是be动词（is,am ,are,was ,were）na肯定回答和否定回答如上：
如果谓语是一些实意动词（如 work ,study ,sing）话,在做肯定或否定回答时需要把实意动词变成do 或don't
例如：
She sings in the bedroom.
一般疑问句：Does she sing in the bedroom?
肯定回答：yes ,she does.
否定回答：no,she doesn't.

Was there a subway 50 years ago？
No there wasn‘t

Was there a subway 50 years ago?
No, there wasn't.