could down
Regular verb: down - downed- downed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could down
you could down
he could down
we could down
you could down
they could down 	I could be downing
you could be downing
he could be downing
we could be downing
you could be downing
they could be downing	I could have downed
you could have downed
he could have downed
we could have downed
you could have downed
they could have downed	I could have been downing
you could have been downing
he could have been downing
we could have been downing
you could have been downing
they could have been downing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not down
you could not down
he could not down
we could not down
you could not down
they could not down 	I could not be downing
you could not be downing
he could not be downing
we could not be downing
you could not be downing
they could not be downing	I could not have downed
you could not have downed
he could not have downed
we could not have downed
you could not have downed
they could not have downed	I could not have been downing
you could not have been downing
he could not have been downing
we could not have been downing
you could not have been downing
they could not have been downing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I down?
could you down?
could he down?
could we down?
could you down?
could they down? 	could I be downing?
could you be downing?
could he be downing?
could we be downing?
could you be downing?
could they be downing? 	could I have downed?
could you have downed?
could he have downed?
could we have downed?
could you have downed?
could they have downed? 	could I have been downing?
could you have been downing?
could he have been downing?
could we have been downing?
could you have been downing?
could they have been downing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not down?
could you not down?
could he not down?
could we not down?
could you not down?
could they not down? 	could I not be downing?
could you not be downing?
could he not be downing?
could we not be downing?
could you not be downing?
could they not be downing? 	could I not have downed?
could you not have downed?
could he not have downed?
could we not have downed?
could you not have downed?
could they not have downed? 	could I not have been downing?
could you not have been downing?
could he not have been downing?
could we not have been downing?
could you not have been downing?
could they not have been downing?