I could assail you could assail she could assail we could assail you could assail they could assail
V-ing form
I could be assailing you could be assailing she could be assailing we could be assailing you could be assailing they could be assailing
Perfect
I could have assailed you could have assailed she could have assailed we could have assailed you could have assailed they could have assailed
V-ing perfect
I could have been assailing you could have been assailing she could have been assailing we could have been assailing you could have been assailing they could have been assailing
Negation
Simple form
I could not assail you could not assail she could not assail we could not assail you could not assail they could not assail
V-ing form
I could not be assailing you could not be assailing she could not be assailing we could not be assailing you could not be assailing they could not be assailing
Perfect
I could not have assailed you could not have assailed she could not have assailed we could not have assailed you could not have assailed they could not have assailed
V-ing perfect
I could not have been assailing you could not have been assailing she could not have been assailing we could not have been assailing you could not have been assailing they could not have been assailing
Interrogative form
Simple form
could I assail? could you assail? could she assail? could we assail? could you assail? could they assail?
V-ing form
could I be assailing? could you be assailing? could she be assailing? could we be assailing? could you be assailing? could they be assailing?
Perfect
could I have assailed? could you have assailed? could she have assailed? could we have assailed? could you have assailed? could they have assailed?
V-ing perfect
could I have been assailing? could you have been assailing? could she have been assailing? could we have been assailing? could you have been assailing? could they have been assailing?
Interro-negative form
Simple form
could I not assail? could you not assail? could she not assail? could we not assail? could you not assail? could they not assail?
V-ing form
could I not be assailing? could you not be assailing? could she not be assailing? could we not be assailing? could you not be assailing? could they not be assailing?
Perfect
could I not have assailed? could you not have assailed? could she not have assailed? could we not have assailed? could you not have assailed? could they not have assailed?
V-ing perfect
could I not have been assailing? could you not have been assailing? could she not have been assailing? could we not have been assailing? could you not have been assailing? could they not have been assailing?