1. +We were having lessons at this time last year.
-We weren't having lessons at this time last year.
?Were we having lessons at this time last year?
2. +Look! Your grandmother is cooking a delicious pie.
-Your grandmother is not cooking a delicious pie.
?Is your grandmother cooking a delicious pie?
3. +This actor often likes giving interviews on the TV.
-This actor doesn't often like giving interviews on the TV.
?Does this actor often like giving interviews on the TV?
4. +She has repainted walls in her room. Now it's beautiful.
-She hasn't repainted walls in her room.
?Has she repainted walls in her room?