English verb conjugation
COULD ENGRAIL

Regular verb: engrail - engrailed - engrailed

Affirmation

Simple form	V-ing form
I could engrail you could engrail he could engrail we could engrail you could engrail they could engrail	I could be engrailing you could be engrailing he 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 he 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 he 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 could not engrail you could not engrail he could not engrail we could not engrail you could not engrail they could not engrail	I could not be engrailing you could not be engrailing he could not be engrailing we could not be engrailing you could not be engrailing they could not be engrailing
Perfect	V-ing perfect
I could not have engrailed you could not have engrailed he could not have engrailed we could not have engrailed you could not have engrailed they could not have engrailed	I could not have been engrailing you could not have been engrailing he could not have been engrailing we could not have been engrailing you could not have been engrailing they could not have been engrailing

Interrogative form

Simple form	V-ing form
could I engrail? could you engrail? could he engrail? could we engrail? could you engrail? could they engrail?	could I be engrailing? could you be engrailing? could he 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 he 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 he 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
could I not engrail? could you not engrail? could he not engrail? could we not engrail? could you not engrail? could they not engrail?	could I not be engrailing? could you not be engrailing? could he not be engrailing? could we not be engrailing? could you not be engrailing? could they not be engrailing?
Perfect	V-ing perfect
could I not have engrailed? could you not have engrailed? could he not have engrailed? could we not have engrailed? could you not have engrailed? could they not have engrailed?	could I not have been engrailing? could you not have been engrailing? could he not have been engrailing? could we not have been engrailing? could you not have been engrailing? could they not have been engrailing?