can down
Regular verb: down - downed- downed

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

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't down
you can't down
she can't down
we can't down
you can't down
they can't down 	I can't be downing
you can't be downing
she can't be downing
we can't be downing
you can't be downing
they can't be downing	I can't have downed
you can't have downed
she can't have downed
we can't have downed
you can't have downed
they can't have downed	I can't have been downing
you can't have been downing
she can't have been downing
we can't have been downing
you can't have been downing
they can't have been downing	

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

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I down?
can't you down?
can't she down?
can't we down?
can't you down?
can't they down? 	can't I be downing?
can't you be downing?
can't she be downing?
can't we be downing?
can't you be downing?
can't they be downing? 	can't I have downed?
can't you have downed?
can't she have downed?
can't we have downed?
can't you have downed?
can't they have downed? 	can't I have been downing?
can't you have been downing?
can't she have been downing?
can't we have been downing?
can't you have been downing?
can't they have been downing?