English verb conjugation
CAN GRAFT

Regular verb: graft - grafted - grafted

Affirmation

Simple form	V-ing form
I can graft you can graft he can graft we can graft you can graft they can graft	I can be grafting you can be grafting he can be grafting we can be grafting you can be grafting they can be grafting
Perfect	V-ing perfect
I can have grafted you can have grafted he can have grafted we can have grafted you can have grafted they can have grafted	I can have been grafting you can have been grafting he can have been grafting we can have been grafting you can have been grafting they can have been grafting

Negation

Simple form	V-ing form
I can't graft you can't graft he can't graft we can't graft you can't graft they can't graft	I can't be grafting you can't be grafting he can't be grafting we can't be grafting you can't be grafting they can't be grafting
Perfect	V-ing perfect
I can't have grafted you can't have grafted he can't have grafted we can't have grafted you can't have grafted they can't have grafted	I can't have been grafting you can't have been grafting he can't have been grafting we can't have been grafting you can't have been grafting they can't have been grafting

Interrogative form

Simple form	V-ing form
can I graft? can you graft? can he graft? can we graft? can you graft? can they graft?	can I be grafting? can you be grafting? can he be grafting? can we be grafting? can you be grafting? can they be grafting?
Perfect	V-ing perfect
can I have grafted? can you have grafted? can he have grafted? can we have grafted? can you have grafted? can they have grafted?	can I have been grafting? can you have been grafting? can he have been grafting? can we have been grafting? can you have been grafting? can they have been grafting?

Interro-negative form

Simple form	V-ing form
can't I graft? can't you graft? can't he graft? can't we graft? can't you graft? can't they graft?	can't I be grafting? can't you be grafting? can't he be grafting? can't we be grafting? can't you be grafting? can't they be grafting?
Perfect	V-ing perfect
can't I have grafted? can't you have grafted? can't he have grafted? can't we have grafted? can't you have grafted? can't they have grafted?	can't I have been grafting? can't you have been grafting? can't he have been grafting? can't we have been grafting? can't you have been grafting? can't they have been grafting?