could assail
Regular verb: assail - assailed- assailed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could assail
you could assail
he could assail
we could assail
you could assail
they could assail 	I could be assailing
you could be assailing
he could be assailing
we could be assailing
you could be assailing
they could be assailing	I could have assailed
you could have assailed
he could have assailed
we could have assailed
you could have assailed
they could have assailed	I could have been assailing
you could have been assailing
he could have been assailing
we could have been assailing
you could have been assailing
they could have been assailing	

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

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