English verb conjugation
COULD ENGRAIL

Regular verb: engrail - engrailed - engrailed

Affirmation

Simple form	V-ing form
I could engrail you could engrail she could engrail we could engrail you could engrail they could engrail	I could be engrailing you could be engrailing she could be engrailing we could be engrailing you could be engrailing they could be engrailing
Perfect	V-ing perfect
I could have engrailed you could have engrailed she could have engrailed we could have engrailed you could have engrailed they could have engrailed	I could have been engrailing you could have been engrailing she could have been engrailing we could have been engrailing you could have been engrailing they could have been engrailing

Negation

Simple form	V-ing form
I couldn't engrail you couldn't engrail she couldn't engrail we couldn't engrail you couldn't engrail they couldn't engrail	I couldn't be engrailing you couldn't be engrailing she couldn't be engrailing we couldn't be engrailing you couldn't be engrailing they couldn't be engrailing
Perfect	V-ing perfect
I couldn't have engrailed you couldn't have engrailed she couldn't have engrailed we couldn't have engrailed you couldn't have engrailed they couldn't have engrailed	I couldn't have been engrailing you couldn't have been engrailing she couldn't have been engrailing we couldn't have been engrailing you couldn't have been engrailing they couldn't have been engrailing

Interrogative form

Simple form	V-ing form
could I engrail? could you engrail? could she engrail? could we engrail? could you engrail? could they engrail?	could I be engrailing? could you be engrailing? could she be engrailing? could we be engrailing? could you be engrailing? could they be engrailing?
Perfect	V-ing perfect
could I have engrailed? could you have engrailed? could she have engrailed? could we have engrailed? could you have engrailed? could they have engrailed?	could I have been engrailing? could you have been engrailing? could she have been engrailing? could we have been engrailing? could you have been engrailing? could they have been engrailing?

Interro-negative form

Simple form	V-ing form
couldn't I engrail? couldn't you engrail? couldn't she engrail? couldn't we engrail? couldn't you engrail? couldn't they engrail?	couldn't I be engrailing? couldn't you be engrailing? couldn't she be engrailing? couldn't we be engrailing? couldn't you be engrailing? couldn't they be engrailing?
Perfect	V-ing perfect
couldn't I have engrailed? couldn't you have engrailed? couldn't she have engrailed? couldn't we have engrailed? couldn't you have engrailed? couldn't they have engrailed?	couldn't I have been engrailing? couldn't you have been engrailing? couldn't she have been engrailing? couldn't we have been engrailing? couldn't you have been engrailing? couldn't they have been engrailing?