2(-)she wasn't my boss
(?) was she my boss?
3(+)they built a new house
(?)did they build a new house?
4(+)i was at the concert last sunday
(?)was i at the concert last sunday?
5(+)you bought clothes in this shop
(-)you didn't buy clothes in this shop
6(+)they borned in Korea
(-)they weren't born in Korea
7(-)he didn't swim in the lake
(?)did he swim in the lake?
8(-)we weren't at the gym last week
(?)were we at the gym last week?
9(+)she went to her office by car
(?)did she go to her office by car?
10(+)he was a good buy
(?)was he a good buy