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 cannot quaff you cannot quaff he cannot quaff we cannot quaff you cannot quaff they cannot quaff	I cannot be quaffing you cannot be quaffing he cannot be quaffing we cannot be quaffing you cannot be quaffing they cannot be quaffing
Perfect	V-ing perfect
I cannot have quaffed you cannot have quaffed he cannot have quaffed we cannot have quaffed you cannot have quaffed they cannot have quaffed	I cannot have been quaffing you cannot have been quaffing he cannot have been quaffing we cannot have been quaffing you cannot have been quaffing they cannot 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 I not quaff? can you not quaff? can he not quaff? can we not quaff? can you not quaff? can they not quaff?	can I not be quaffing? can you not be quaffing? can he not be quaffing? can we not be quaffing? can you not be quaffing? can they not be quaffing?
Perfect	V-ing perfect
can I not have quaffed? can you not have quaffed? can he not have quaffed? can we not have quaffed? can you not have quaffed? can they not have quaffed?	can I not have been quaffing? can you not have been quaffing? can he not have been quaffing? can we not have been quaffing? can you not have been quaffing? can they not have been quaffing?