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 cannot graft you cannot graft he cannot graft we cannot graft you cannot graft they cannot graft	I cannot be grafting you cannot be grafting he cannot be grafting we cannot be grafting you cannot be grafting they cannot be grafting
Perfect	V-ing perfect
I cannot have grafted you cannot have grafted he cannot have grafted we cannot have grafted you cannot have grafted they cannot have grafted	I cannot have been grafting you cannot have been grafting he cannot have been grafting we cannot have been grafting you cannot have been grafting they cannot 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 I not graft? can you not graft? can he not graft? can we not graft? can you not graft? can they not graft?	can I not be grafting? can you not be grafting? can he not be grafting? can we not be grafting? can you not be grafting? can they not be grafting?
Perfect	V-ing perfect
can I not have grafted? can you not have grafted? can he not have grafted? can we not have grafted? can you not have grafted? can they not have grafted?	can I not have been grafting? can you not have been grafting? can he not have been grafting? can we not have been grafting? can you not have been grafting? can they not have been grafting?