English verb conjugation
COULD SAND

Regular verb: sand - sanded - sanded

Affirmation

Simple form	V-ing form
I could sand you could sand she could sand we could sand you could sand they could sand	I could be sanding you could be sanding she could be sanding we could be sanding you could be sanding they could be sanding
Perfect	V-ing perfect
I could have sanded you could have sanded she could have sanded we could have sanded you could have sanded they could have sanded	I could have been sanding you could have been sanding she could have been sanding we could have been sanding you could have been sanding they could have been sanding

Negation

Simple form	V-ing form
I couldn't sand you couldn't sand she couldn't sand we couldn't sand you couldn't sand they couldn't sand	I couldn't be sanding you couldn't be sanding she couldn't be sanding we couldn't be sanding you couldn't be sanding they couldn't be sanding
Perfect	V-ing perfect
I couldn't have sanded you couldn't have sanded she couldn't have sanded we couldn't have sanded you couldn't have sanded they couldn't have sanded	I couldn't have been sanding you couldn't have been sanding she couldn't have been sanding we couldn't have been sanding you couldn't have been sanding they couldn't have been sanding

Interrogative form

Simple form	V-ing form
could I sand? could you sand? could she sand? could we sand? could you sand? could they sand?	could I be sanding? could you be sanding? could she be sanding? could we be sanding? could you be sanding? could they be sanding?
Perfect	V-ing perfect
could I have sanded? could you have sanded? could she have sanded? could we have sanded? could you have sanded? could they have sanded?	could I have been sanding? could you have been sanding? could she have been sanding? could we have been sanding? could you have been sanding? could they have been sanding?

Interro-negative form

Simple form	V-ing form
couldn't I sand? couldn't you sand? couldn't she sand? couldn't we sand? couldn't you sand? couldn't they sand?	couldn't I be sanding? couldn't you be sanding? couldn't she be sanding? couldn't we be sanding? couldn't you be sanding? couldn't they be sanding?
Perfect	V-ing perfect
couldn't I have sanded? couldn't you have sanded? couldn't she have sanded? couldn't we have sanded? couldn't you have sanded? couldn't they have sanded?	couldn't I have been sanding? couldn't you have been sanding? couldn't she have been sanding? couldn't we have been sanding? couldn't you have been sanding? couldn't they have been sanding?