English verb conjugation
CAN QUAFF

Regular verb: quaff - quaffed - quaffed

Affirmation

Simple form	V-ing form
I can quaff you can quaff he can quaff we can quaff you can quaff they can quaff	I can be quaffing you can be quaffing he can be quaffing we can be quaffing you can be quaffing they can be quaffing
Perfect	V-ing perfect
I can have quaffed you can have quaffed he can have quaffed we can have quaffed you can have quaffed they can have quaffed	I can have been quaffing you can have been quaffing he can have been quaffing we can have been quaffing you can have been quaffing they can have been quaffing

Negation

Simple form	V-ing form
I can't quaff you can't quaff he can't quaff we can't quaff you can't quaff they can't quaff	I can't be quaffing you can't be quaffing he can't be quaffing we can't be quaffing you can't be quaffing they can't be quaffing
Perfect	V-ing perfect
I can't have quaffed you can't have quaffed he can't have quaffed we can't have quaffed you can't have quaffed they can't have quaffed	I can't have been quaffing you can't have been quaffing he can't have been quaffing we can't have been quaffing you can't have been quaffing they can't have been quaffing

Interrogative form

Simple form	V-ing form
can I quaff? can you quaff? can he quaff? can we quaff? can you quaff? can they quaff?	can I be quaffing? can you be quaffing? can he be quaffing? can we be quaffing? can you be quaffing? can they be quaffing?
Perfect	V-ing perfect
can I have quaffed? can you have quaffed? can he have quaffed? can we have quaffed? can you have quaffed? can they have quaffed?	can I have been quaffing? can you have been quaffing? can he have been quaffing? can we have been quaffing? can you have been quaffing? can they have been quaffing?

Interro-negative form

Simple form	V-ing form
can't I quaff? can't you quaff? can't he quaff? can't we quaff? can't you quaff? can't they quaff?	can't I be quaffing? can't you be quaffing? can't he be quaffing? can't we be quaffing? can't you be quaffing? can't they be quaffing?
Perfect	V-ing perfect
can't I have quaffed? can't you have quaffed? can't he have quaffed? can't we have quaffed? can't you have quaffed? can't they have quaffed?	can't I have been quaffing? can't you have been quaffing? can't he have been quaffing? can't we have been quaffing? can't you have been quaffing? can't they have been quaffing?