could cascade
Regular verb: cascade - cascaded- cascaded

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could cascade
you could cascade
he could cascade
we could cascade
you could cascade
they could cascade 	I could be cascading
you could be cascading
he could be cascading
we could be cascading
you could be cascading
they could be cascading	I could have cascaded
you could have cascaded
he could have cascaded
we could have cascaded
you could have cascaded
they could have cascaded	I could have been cascading
you could have been cascading
he could have been cascading
we could have been cascading
you could have been cascading
they could have been cascading	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not cascade
you could not cascade
he could not cascade
we could not cascade
you could not cascade
they could not cascade 	I could not be cascading
you could not be cascading
he could not be cascading
we could not be cascading
you could not be cascading
they could not be cascading	I could not have cascaded
you could not have cascaded
he could not have cascaded
we could not have cascaded
you could not have cascaded
they could not have cascaded	I could not have been cascading
you could not have been cascading
he could not have been cascading
we could not have been cascading
you could not have been cascading
they could not have been cascading	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I cascade?
could you cascade?
could he cascade?
could we cascade?
could you cascade?
could they cascade? 	could I be cascading?
could you be cascading?
could he be cascading?
could we be cascading?
could you be cascading?
could they be cascading? 	could I have cascaded?
could you have cascaded?
could he have cascaded?
could we have cascaded?
could you have cascaded?
could they have cascaded? 	could I have been cascading?
could you have been cascading?
could he have been cascading?
could we have been cascading?
could you have been cascading?
could they have been cascading? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not cascade?
could you not cascade?
could he not cascade?
could we not cascade?
could you not cascade?
could they not cascade? 	could I not be cascading?
could you not be cascading?
could he not be cascading?
could we not be cascading?
could you not be cascading?
could they not be cascading? 	could I not have cascaded?
could you not have cascaded?
could he not have cascaded?
could we not have cascaded?
could you not have cascaded?
could they not have cascaded? 	could I not have been cascading?
could you not have been cascading?
could he not have been cascading?
could we not have been cascading?
could you not have been cascading?
could they not have been cascading?