1.(-) She wasn’t my boss
(?) Was she your boss?
2.(+) I was at the concert last Sunday
(?) Was you at the concert last Sunday ?
3.(+) I bought clothes in this clothes shop
(-) I didn’t buy clothes in this clothes shop
4. (+)They were born in Korea
(-) They weren’t born in Korea
5. (-) We didn’t swim in the lake
(?) Did they swim in the lake?
6.(-) We weren’t at the gym last week
(?) Were they at the gym last week ?
6.(+) She went to her office by car
(?) Did she go to her office by car?