English verb conjugation
CAN CHAFF

Regular verb: chaff - chaffed - chaffed

Affirmation

Simple form	V-ing form
I can chaff you can chaff she can chaff we can chaff you can chaff they can chaff	I can be chaffing you can be chaffing she 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 she 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 she 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 she cannot chaff we cannot chaff you cannot chaff they cannot chaff	I cannot be chaffing you cannot be chaffing she 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 she 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 she 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 she chaff? can we chaff? can you chaff? can they chaff?	can I be chaffing? can you be chaffing? can she 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 she 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 she 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 she 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 she 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 she 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 she not have been chaffing? can we not have been chaffing? can you not have been chaffing? can they not have been chaffing?