English verb conjugation
COULD INGRAFT

Regular verb: ingraft - ingrafted - ingrafted

Affirmation

Simple form	V-ing form
I could ingraft you could ingraft he could ingraft we could ingraft you could ingraft they could ingraft	I could be ingrafting you could be ingrafting he could be ingrafting we could be ingrafting you could be ingrafting they could be ingrafting
Perfect	V-ing perfect
I could have ingrafted you could have ingrafted he could have ingrafted we could have ingrafted you could have ingrafted they could have ingrafted	I could have been ingrafting you could have been ingrafting he could have been ingrafting we could have been ingrafting you could have been ingrafting they could have been ingrafting

Negation

Simple form	V-ing form
I could not ingraft you could not ingraft he could not ingraft we could not ingraft you could not ingraft they could not ingraft	I could not be ingrafting you could not be ingrafting he could not be ingrafting we could not be ingrafting you could not be ingrafting they could not be ingrafting
Perfect	V-ing perfect
I could not have ingrafted you could not have ingrafted he could not have ingrafted we could not have ingrafted you could not have ingrafted they could not have ingrafted	I could not have been ingrafting you could not have been ingrafting he could not have been ingrafting we could not have been ingrafting you could not have been ingrafting they could not have been ingrafting

Interrogative form

Simple form	V-ing form
could I ingraft? could you ingraft? could he ingraft? could we ingraft? could you ingraft? could they ingraft?	could I be ingrafting? could you be ingrafting? could he be ingrafting? could we be ingrafting? could you be ingrafting? could they be ingrafting?
Perfect	V-ing perfect
could I have ingrafted? could you have ingrafted? could he have ingrafted? could we have ingrafted? could you have ingrafted? could they have ingrafted?	could I have been ingrafting? could you have been ingrafting? could he have been ingrafting? could we have been ingrafting? could you have been ingrafting? could they have been ingrafting?

Interro-negative form

Simple form	V-ing form
could I not ingraft? could you not ingraft? could he not ingraft? could we not ingraft? could you not ingraft? could they not ingraft?	could I not be ingrafting? could you not be ingrafting? could he not be ingrafting? could we not be ingrafting? could you not be ingrafting? could they not be ingrafting?
Perfect	V-ing perfect
could I not have ingrafted? could you not have ingrafted? could he not have ingrafted? could we not have ingrafted? could you not have ingrafted? could they not have ingrafted?	could I not have been ingrafting? could you not have been ingrafting? could he not have been ingrafting? could we not have been ingrafting? could you not have been ingrafting? could they not have been ingrafting?