English verb conjugation
MUST SANDPAPER

Regular verb: sandpaper - sandpapered - sandpapered

Affirmation

Simple form	V-ing form
I must sandpaper you must sandpaper he must sandpaper we must sandpaper you must sandpaper they must sandpaper	I must be sandpapering you must be sandpapering he must be sandpapering we must be sandpapering you must be sandpapering they must be sandpapering
Perfect	V-ing perfect
I must have sandpapered you must have sandpapered he must have sandpapered we must have sandpapered you must have sandpapered they must have sandpapered	I must have been sandpapering you must have been sandpapering he must have been sandpapering we must have been sandpapering you must have been sandpapering they must have been sandpapering

Negation

Simple form	V-ing form
I mustn't sandpaper you mustn't sandpaper he mustn't sandpaper we mustn't sandpaper you mustn't sandpaper they mustn't sandpaper	I mustn't be sandpapering you mustn't be sandpapering he mustn't be sandpapering we mustn't be sandpapering you mustn't be sandpapering they mustn't be sandpapering
Perfect	V-ing perfect
I mustn't have sandpapered you mustn't have sandpapered he mustn't have sandpapered we mustn't have sandpapered you mustn't have sandpapered they mustn't have sandpapered	I mustn't have been sandpapering you mustn't have been sandpapering he mustn't have been sandpapering we mustn't have been sandpapering you mustn't have been sandpapering they mustn't have been sandpapering

Interrogative form

Simple form	V-ing form
must I sandpaper? must you sandpaper? must he sandpaper? must we sandpaper? must you sandpaper? must they sandpaper?	must I be sandpapering? must you be sandpapering? must he be sandpapering? must we be sandpapering? must you be sandpapering? must they be sandpapering?
Perfect	V-ing perfect
must I have sandpapered? must you have sandpapered? must he have sandpapered? must we have sandpapered? must you have sandpapered? must they have sandpapered?	must I have been sandpapering? must you have been sandpapering? must he have been sandpapering? must we have been sandpapering? must you have been sandpapering? must they have been sandpapering?

Interro-negative form

Simple form	V-ing form
mustn't I sandpaper? mustn't you sandpaper? mustn't he sandpaper? mustn't we sandpaper? mustn't you sandpaper? mustn't they sandpaper?	mustn't I be sandpapering? mustn't you be sandpapering? mustn't he be sandpapering? mustn't we be sandpapering? mustn't you be sandpapering? mustn't they be sandpapering?
Perfect	V-ing perfect
mustn't I have sandpapered? mustn't you have sandpapered? mustn't he have sandpapered? mustn't we have sandpapered? mustn't you have sandpapered? mustn't they have sandpapered?	mustn't I have been sandpapering? mustn't you have been sandpapering? mustn't he have been sandpapering? mustn't we have been sandpapering? mustn't you have been sandpapering? mustn't they have been sandpapering?