English verb conjugation
CAN BUM

Regular verb: bum - bummed - bummed

Affirmation

Simple form	V-ing form
I can bum you can bum he can bum we can bum you can bum they can bum	I can be bumming you can be bumming he can be bumming we can be bumming you can be bumming they can be bumming
Perfect	V-ing perfect
I can have bummed you can have bummed he can have bummed we can have bummed you can have bummed they can have bummed	I can have been bumming you can have been bumming he can have been bumming we can have been bumming you can have been bumming they can have been bumming

Negation

Simple form	V-ing form
I can't bum you can't bum he can't bum we can't bum you can't bum they can't bum	I can't be bumming you can't be bumming he can't be bumming we can't be bumming you can't be bumming they can't be bumming
Perfect	V-ing perfect
I can't have bummed you can't have bummed he can't have bummed we can't have bummed you can't have bummed they can't have bummed	I can't have been bumming you can't have been bumming he can't have been bumming we can't have been bumming you can't have been bumming they can't have been bumming

Interrogative form

Simple form	V-ing form
can I bum? can you bum? can he bum? can we bum? can you bum? can they bum?	can I be bumming? can you be bumming? can he be bumming? can we be bumming? can you be bumming? can they be bumming?
Perfect	V-ing perfect
can I have bummed? can you have bummed? can he have bummed? can we have bummed? can you have bummed? can they have bummed?	can I have been bumming? can you have been bumming? can he have been bumming? can we have been bumming? can you have been bumming? can they have been bumming?

Interro-negative form

Simple form	V-ing form
can't I bum? can't you bum? can't he bum? can't we bum? can't you bum? can't they bum?	can't I be bumming? can't you be bumming? can't he be bumming? can't we be bumming? can't you be bumming? can't they be bumming?
Perfect	V-ing perfect
can't I have bummed? can't you have bummed? can't he have bummed? can't we have bummed? can't you have bummed? can't they have bummed?	can't I have been bumming? can't you have been bumming? can't he have been bumming? can't we have been bumming? can't you have been bumming? can't they have been bumming?