English verb conjugation
COULD AVAIL

Regular verb: avail - availed - availed

Affirmation

Simple form	V-ing form
I could avail you could avail he could avail we could avail you could avail they could avail	I could be availing you could be availing he could be availing we could be availing you could be availing they could be availing
Perfect	V-ing perfect
I could have availed you could have availed he could have availed we could have availed you could have availed they could have availed	I could have been availing you could have been availing he could have been availing we could have been availing you could have been availing they could have been availing

Negation

Simple form	V-ing form
I couldn't avail you couldn't avail he couldn't avail we couldn't avail you couldn't avail they couldn't avail	I couldn't be availing you couldn't be availing he couldn't be availing we couldn't be availing you couldn't be availing they couldn't be availing
Perfect	V-ing perfect
I couldn't have availed you couldn't have availed he couldn't have availed we couldn't have availed you couldn't have availed they couldn't have availed	I couldn't have been availing you couldn't have been availing he couldn't have been availing we couldn't have been availing you couldn't have been availing they couldn't have been availing

Interrogative form

Simple form	V-ing form
could I avail? could you avail? could he avail? could we avail? could you avail? could they avail?	could I be availing? could you be availing? could he be availing? could we be availing? could you be availing? could they be availing?
Perfect	V-ing perfect
could I have availed? could you have availed? could he have availed? could we have availed? could you have availed? could they have availed?	could I have been availing? could you have been availing? could he have been availing? could we have been availing? could you have been availing? could they have been availing?

Interro-negative form

Simple form	V-ing form
couldn't I avail? couldn't you avail? couldn't he avail? couldn't we avail? couldn't you avail? couldn't they avail?	couldn't I be availing? couldn't you be availing? couldn't he be availing? couldn't we be availing? couldn't you be availing? couldn't they be availing?
Perfect	V-ing perfect
couldn't I have availed? couldn't you have availed? couldn't he have availed? couldn't we have availed? couldn't you have availed? couldn't they have availed?	couldn't I have been availing? couldn't you have been availing? couldn't he have been availing? couldn't we have been availing? couldn't you have been availing? couldn't they have been availing?