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 must not wallpaper you must not wallpaper she must not wallpaper we must not wallpaper you must not wallpaper they must not wallpaper
V-ing form
I must not be wallpapering you must not be wallpapering she must not be wallpapering we must not be wallpapering you must not be wallpapering they must not be wallpapering
Perfect
I must not have wallpapered you must not have wallpapered she must not have wallpapered we must not have wallpapered you must not have wallpapered they must not have wallpapered
V-ing perfect
I must not have been wallpapering you must not have been wallpapering she must not have been wallpapering we must not have been wallpapering you must not have been wallpapering they must not 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
must I not wallpaper? must you not wallpaper? must she not wallpaper? must we not wallpaper? must you not wallpaper? must they not wallpaper?
V-ing form
must I not be wallpapering? must you not be wallpapering? must she not be wallpapering? must we not be wallpapering? must you not be wallpapering? must they not be wallpapering?
Perfect
must I not have wallpapered? must you not have wallpapered? must she not have wallpapered? must we not have wallpapered? must you not have wallpapered? must they not have wallpapered?
V-ing perfect
must I not have been wallpapering? must you not have been wallpapering? must she not have been wallpapering? must we not have been wallpapering? must you not have been wallpapering? must they not have been wallpapering?