English verb conjugation
CAN QUAFF

Regular verb: quaff - quaffed - quaffed

Affirmation

Simple form	V-ing form
I can quaff you can quaff she can quaff we can quaff you can quaff they can quaff	I can be quaffing you can be quaffing she 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 she 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 she 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 she 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 she 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 she 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 she 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 she quaff? can we quaff? can you quaff? can they quaff?	can I be quaffing? can you be quaffing? can she 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 she 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 she 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 she 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 she 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 she 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 she have been quaffing? can't we have been quaffing? can't you have been quaffing? can't they have been quaffing?