English verb conjugation
COULD AVAIL

Regular verb: avail - availed - availed

Affirmation

Simple form	V-ing form
I could avail you could avail she could avail we could avail you could avail they could avail	I could be availing you could be availing she 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 she 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 she 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 she 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 she 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 she 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 she 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 she avail? could we avail? could you avail? could they avail?	could I be availing? could you be availing? could she 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 she 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 she 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 she 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 she 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 she 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 she have been availing? couldn't we have been availing? couldn't you have been availing? couldn't they have been availing?