There were many people in the shop last weekend.
否定句
there weren't many people in the shop last weekend.
疑问句
were there many people in the shop last weekend?
答
Yes,there were.
特殊疑问句
when were there many people in the shop?
或者 what's in the shop that weekend?
或者 where were many people last weeken?
反义疑问句
weren't there many people in the shop last weekend?