Iwasatthebutcher’s变为否定句一般疑问句并做肯定否定回答，知道的，请告诉我谢谢！

Question

Iwasatthebutcher’s变为否定句一般疑问句并做肯定否定回答，知道的，请告诉我谢谢！

Answer 1

I was at the butcher’s。
变为否定句:I wasn't at the butcher's。
一般疑问句:were you at the butcher's?
肯定回答:Yes,I was。
否定回答:No,I wasn't。

Answer 2

I was at the butcher's.
I wasn't at the butcher's.
Were you at the butcher's?Yes, I was. No, I wasn't.