English verb conjugation
COULD SANDPAPER

Regular verb: sandpaper - sandpapered - sandpapered

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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