English verb conjugation
CAN QUAIL

Regular verb: quail - quailed - quailed

Affirmation

Simple form	V-ing form
I can quail you can quail he can quail we can quail you can quail they can quail	I can be quailing you can be quailing he can be quailing we can be quailing you can be quailing they can be quailing
Perfect	V-ing perfect
I can have quailed you can have quailed he can have quailed we can have quailed you can have quailed they can have quailed	I can have been quailing you can have been quailing he can have been quailing we can have been quailing you can have been quailing they can have been quailing

Negation

Simple form	V-ing form
I can't quail you can't quail he can't quail we can't quail you can't quail they can't quail	I can't be quailing you can't be quailing he can't be quailing we can't be quailing you can't be quailing they can't be quailing
Perfect	V-ing perfect
I can't have quailed you can't have quailed he can't have quailed we can't have quailed you can't have quailed they can't have quailed	I can't have been quailing you can't have been quailing he can't have been quailing we can't have been quailing you can't have been quailing they can't have been quailing

Interrogative form

Simple form	V-ing form
can I quail? can you quail? can he quail? can we quail? can you quail? can they quail?	can I be quailing? can you be quailing? can he be quailing? can we be quailing? can you be quailing? can they be quailing?
Perfect	V-ing perfect
can I have quailed? can you have quailed? can he have quailed? can we have quailed? can you have quailed? can they have quailed?	can I have been quailing? can you have been quailing? can he have been quailing? can we have been quailing? can you have been quailing? can they have been quailing?

Interro-negative form

Simple form	V-ing form
can't I quail? can't you quail? can't he quail? can't we quail? can't you quail? can't they quail?	can't I be quailing? can't you be quailing? can't he be quailing? can't we be quailing? can't you be quailing? can't they be quailing?
Perfect	V-ing perfect
can't I have quailed? can't you have quailed? can't he have quailed? can't we have quailed? can't you have quailed? can't they have quailed?	can't I have been quailing? can't you have been quailing? can't he have been quailing? can't we have been quailing? can't you have been quailing? can't they have been quailing?