My father goes fishing in the lake every week.

(-)My father doesn't go fishing in the lake every week.

(?)Does my father go fishing in the lake every week?

My classmate does the homework.

(-)My classmate doesn't do the homework.

(?)Does my classmate do the homework?

We often play soccer.

(-)We often don't play soccer.

(?)Do we often play soccer?

He goes to school every morning.

(-)He doesn't go to school every morning.

(?)Does he go to school every morning?

She understands English.

(-)She doesn't understand English.

(?)Does she understand English?

1. At this time last year, they were building­­­­­­­­­­­­ this stadium.

 -> At this time last year, they were not building­­­­­­­­­­­­ this stadium.

 -> At this time last year, were they buiding this stadium?

2. My brother was watching TV when I got home.

 -> My brother was not watching TV when I got home.

-> Was your brother watching TV when I got home?

3. He was walking in the park when it rained.

-> He was not walking in the park when it rained.

-> Was he walking in the park when it rained?

4. I was watching TV at 8 o’clock last night.

-> I was not watching TV at 8 o’clock last night.

-> Were you watching TV at 8 o’clock last night?

5. Nam was listening to music while his mother was cooking in the kitchen. 

-> Nam was not listening to music while his mother was cooking in the kitchen. 

-> Was Nam listening to music while his mother was cooking in the kitchen?