I must wallpaper you must wallpaper she must wallpaper we must wallpaper you must wallpaper they must wallpaper
V-ing form
I must be wallpapering you must be wallpapering she must be wallpapering we must be wallpapering you must be wallpapering they must be wallpapering
Perfect
I must have wallpapered you must have wallpapered she must have wallpapered we must have wallpapered you must have wallpapered they must have wallpapered
V-ing perfect
I must have been wallpapering you must have been wallpapering she must have been wallpapering we must have been wallpapering you must have been wallpapering they must have been wallpapering
Negation
Simple form
I mustn't wallpaper you mustn't wallpaper she mustn't wallpaper we mustn't wallpaper you mustn't wallpaper they mustn't wallpaper
V-ing form
I mustn't be wallpapering you mustn't be wallpapering she mustn't be wallpapering we mustn't be wallpapering you mustn't be wallpapering they mustn't be wallpapering
Perfect
I mustn't have wallpapered you mustn't have wallpapered she mustn't have wallpapered we mustn't have wallpapered you mustn't have wallpapered they mustn't have wallpapered
V-ing perfect
I mustn't have been wallpapering you mustn't have been wallpapering she mustn't have been wallpapering we mustn't have been wallpapering you mustn't have been wallpapering they mustn't have been wallpapering
Interrogative form
Simple form
must I wallpaper? must you wallpaper? must she wallpaper? must we wallpaper? must you wallpaper? must they wallpaper?
V-ing form
must I be wallpapering? must you be wallpapering? must she be wallpapering? must we be wallpapering? must you be wallpapering? must they be wallpapering?
Perfect
must I have wallpapered? must you have wallpapered? must she have wallpapered? must we have wallpapered? must you have wallpapered? must they have wallpapered?
V-ing perfect
must I have been wallpapering? must you have been wallpapering? must she have been wallpapering? must we have been wallpapering? must you have been wallpapering? must they have been wallpapering?
Interro-negative form
Simple form
mustn't I wallpaper? mustn't you wallpaper? mustn't she wallpaper? mustn't we wallpaper? mustn't you wallpaper? mustn't they wallpaper?
V-ing form
mustn't I be wallpapering? mustn't you be wallpapering? mustn't she be wallpapering? mustn't we be wallpapering? mustn't you be wallpapering? mustn't they be wallpapering?
Perfect
mustn't I have wallpapered? mustn't you have wallpapered? mustn't she have wallpapered? mustn't we have wallpapered? mustn't you have wallpapered? mustn't they have wallpapered?
V-ing perfect
mustn't I have been wallpapering? mustn't you have been wallpapering? mustn't she have been wallpapering? mustn't we have been wallpapering? mustn't you have been wallpapering? mustn't they have been wallpapering?