English verb conjugation
COULD CHAFF

Regular verb: chaff - chaffed - chaffed

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

Simple form	V-ing form
couldn't I chaff? couldn't you chaff? couldn't he chaff? couldn't we chaff? couldn't you chaff? couldn't they chaff?	couldn't I be chaffing? couldn't you be chaffing? couldn't he be chaffing? couldn't we be chaffing? couldn't you be chaffing? couldn't they be chaffing?
Perfect	V-ing perfect
couldn't I have chaffed? couldn't you have chaffed? couldn't he have chaffed? couldn't we have chaffed? couldn't you have chaffed? couldn't they have chaffed?	couldn't I have been chaffing? couldn't you have been chaffing? couldn't he have been chaffing? couldn't we have been chaffing? couldn't you have been chaffing? couldn't they have been chaffing?