English verb conjugation
CAN CHAFF

Regular verb: chaff - chaffed - chaffed

Affirmation

Simple form	V-ing form
I can chaff you can chaff he can chaff we can chaff you can chaff they can chaff	I can be chaffing you can be chaffing he can be chaffing we can be chaffing you can be chaffing they can be chaffing
Perfect	V-ing perfect
I can have chaffed you can have chaffed he can have chaffed we can have chaffed you can have chaffed they can have chaffed	I can have been chaffing you can have been chaffing he can have been chaffing we can have been chaffing you can have been chaffing they can have been chaffing

Negation

Simple form	V-ing form
I cannot chaff you cannot chaff he cannot chaff we cannot chaff you cannot chaff they cannot chaff	I cannot be chaffing you cannot be chaffing he cannot be chaffing we cannot be chaffing you cannot be chaffing they cannot be chaffing
Perfect	V-ing perfect
I cannot have chaffed you cannot have chaffed he cannot have chaffed we cannot have chaffed you cannot have chaffed they cannot have chaffed	I cannot have been chaffing you cannot have been chaffing he cannot have been chaffing we cannot have been chaffing you cannot have been chaffing they cannot have been chaffing

Interrogative form

Simple form	V-ing form
can I chaff? can you chaff? can he chaff? can we chaff? can you chaff? can they chaff?	can I be chaffing? can you be chaffing? can he be chaffing? can we be chaffing? can you be chaffing? can they be chaffing?
Perfect	V-ing perfect
can I have chaffed? can you have chaffed? can he have chaffed? can we have chaffed? can you have chaffed? can they have chaffed?	can I have been chaffing? can you have been chaffing? can he have been chaffing? can we have been chaffing? can you have been chaffing? can they have been chaffing?

Interro-negative form

Simple form	V-ing form
can I not chaff? can you not chaff? can he not chaff? can we not chaff? can you not chaff? can they not chaff?	can I not be chaffing? can you not be chaffing? can he not be chaffing? can we not be chaffing? can you not be chaffing? can they not be chaffing?
Perfect	V-ing perfect
can I not have chaffed? can you not have chaffed? can he not have chaffed? can we not have chaffed? can you not have chaffed? can they not have chaffed?	can I not have been chaffing? can you not have been chaffing? can he not have been chaffing? can we not have been chaffing? can you not have been chaffing? can they not have been chaffing?