1. They are going to have a picnic near the lake on sunday morning.
(-) They aren't going to have a picnic near the lake on sunday morning.
(?) Are they going to have a picnic near the lake on sunday morning?
2. Ba is going to bring a camera to take some photos.
(-) Ba isn't going to bring a camera to take some photos.
(?) Is Ba going to bring a camera to take some photos?
3. They are going to camp for ten day.
(-) They aren't going to camp for ten day.
(?) Are they going to camp for ten day?