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 couldn't ingraft you couldn't ingraft he couldn't ingraft we couldn't ingraft you couldn't ingraft they couldn't ingraft	I couldn't be ingrafting you couldn't be ingrafting he couldn't be ingrafting we couldn't be ingrafting you couldn't be ingrafting they couldn't be ingrafting
Perfect	V-ing perfect
I couldn't have ingrafted you couldn't have ingrafted he couldn't have ingrafted we couldn't have ingrafted you couldn't have ingrafted they couldn't have ingrafted	I couldn't have been ingrafting you couldn't have been ingrafting he couldn't have been ingrafting we couldn't have been ingrafting you couldn't have been ingrafting they couldn't 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
couldn't I ingraft? couldn't you ingraft? couldn't he ingraft? couldn't we ingraft? couldn't you ingraft? couldn't they ingraft?	couldn't I be ingrafting? couldn't you be ingrafting? couldn't he be ingrafting? couldn't we be ingrafting? couldn't you be ingrafting? couldn't they be ingrafting?
Perfect	V-ing perfect
couldn't I have ingrafted? couldn't you have ingrafted? couldn't he have ingrafted? couldn't we have ingrafted? couldn't you have ingrafted? couldn't they have ingrafted?	couldn't I have been ingrafting? couldn't you have been ingrafting? couldn't he have been ingrafting? couldn't we have been ingrafting? couldn't you have been ingrafting? couldn't they have been ingrafting?