They were teachers last year.改为一般疑问句和否定句并作肯定回答和否定回答
问题描述：
They were teachers last year.改为一般疑问句和否定句并作肯定回答和否定回答
答
Were they teachers last year?
yes,they were
no.they weren't
They weren't teachers last year
答
Were they teachers last year?
yes,they were
no.they weren't
They weren't teachers last year