English verb conjugation
CAN BARBER

Regular verb: barber - barbered - barbered

Affirmation

Simple form	V-ing form
I can barber you can barber he can barber we can barber you can barber they can barber	I can be barbering you can be barbering he can be barbering we can be barbering you can be barbering they can be barbering
Perfect	V-ing perfect
I can have barbered you can have barbered he can have barbered we can have barbered you can have barbered they can have barbered	I can have been barbering you can have been barbering he can have been barbering we can have been barbering you can have been barbering they can have been barbering

Negation

Simple form	V-ing form
I cannot barber you cannot barber he cannot barber we cannot barber you cannot barber they cannot barber	I cannot be barbering you cannot be barbering he cannot be barbering we cannot be barbering you cannot be barbering they cannot be barbering
Perfect	V-ing perfect
I cannot have barbered you cannot have barbered he cannot have barbered we cannot have barbered you cannot have barbered they cannot have barbered	I cannot have been barbering you cannot have been barbering he cannot have been barbering we cannot have been barbering you cannot have been barbering they cannot have been barbering

Interrogative form

Simple form	V-ing form
can I barber? can you barber? can he barber? can we barber? can you barber? can they barber?	can I be barbering? can you be barbering? can he be barbering? can we be barbering? can you be barbering? can they be barbering?
Perfect	V-ing perfect
can I have barbered? can you have barbered? can he have barbered? can we have barbered? can you have barbered? can they have barbered?	can I have been barbering? can you have been barbering? can he have been barbering? can we have been barbering? can you have been barbering? can they have been barbering?

Interro-negative form

Simple form	V-ing form
can I not barber? can you not barber? can he not barber? can we not barber? can you not barber? can they not barber?	can I not be barbering? can you not be barbering? can he not be barbering? can we not be barbering? can you not be barbering? can they not be barbering?
Perfect	V-ing perfect
can I not have barbered? can you not have barbered? can he not have barbered? can we not have barbered? can you not have barbered? can they not have barbered?	can I not have been barbering? can you not have been barbering? can he not have been barbering? can we not have been barbering? can you not have been barbering? can they not have been barbering?