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 cannot quail you cannot quail he cannot quail we cannot quail you cannot quail they cannot quail	I cannot be quailing you cannot be quailing he cannot be quailing we cannot be quailing you cannot be quailing they cannot be quailing
Perfect	V-ing perfect
I cannot have quailed you cannot have quailed he cannot have quailed we cannot have quailed you cannot have quailed they cannot have quailed	I cannot have been quailing you cannot have been quailing he cannot have been quailing we cannot have been quailing you cannot have been quailing they cannot 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 I not quail? can you not quail? can he not quail? can we not quail? can you not quail? can they not quail?	can I not be quailing? can you not be quailing? can he not be quailing? can we not be quailing? can you not be quailing? can they not be quailing?
Perfect	V-ing perfect
can I not have quailed? can you not have quailed? can he not have quailed? can we not have quailed? can you not have quailed? can they not have quailed?	can I not have been quailing? can you not have been quailing? can he not have been quailing? can we not have been quailing? can you not have been quailing? can they not have been quailing?