English verb conjugation
COULD QUAIL

Regular verb: quail - quailed - quailed

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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