could subirrigate
Regular verb: subirrigate - subirrigated- subirrigated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could subirrigate
you could subirrigate
he could subirrigate
we could subirrigate
you could subirrigate
they could subirrigate 	I could be subirrigating
you could be subirrigating
he could be subirrigating
we could be subirrigating
you could be subirrigating
they could be subirrigating	I could have subirrigated
you could have subirrigated
he could have subirrigated
we could have subirrigated
you could have subirrigated
they could have subirrigated	I could have been subirrigating
you could have been subirrigating
he could have been subirrigating
we could have been subirrigating
you could have been subirrigating
they could have been subirrigating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not subirrigate
you could not subirrigate
he could not subirrigate
we could not subirrigate
you could not subirrigate
they could not subirrigate 	I could not be subirrigating
you could not be subirrigating
he could not be subirrigating
we could not be subirrigating
you could not be subirrigating
they could not be subirrigating	I could not have subirrigated
you could not have subirrigated
he could not have subirrigated
we could not have subirrigated
you could not have subirrigated
they could not have subirrigated	I could not have been subirrigating
you could not have been subirrigating
he could not have been subirrigating
we could not have been subirrigating
you could not have been subirrigating
they could not have been subirrigating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I subirrigate?
could you subirrigate?
could he subirrigate?
could we subirrigate?
could you subirrigate?
could they subirrigate? 	could I be subirrigating?
could you be subirrigating?
could he be subirrigating?
could we be subirrigating?
could you be subirrigating?
could they be subirrigating? 	could I have subirrigated?
could you have subirrigated?
could he have subirrigated?
could we have subirrigated?
could you have subirrigated?
could they have subirrigated? 	could I have been subirrigating?
could you have been subirrigating?
could he have been subirrigating?
could we have been subirrigating?
could you have been subirrigating?
could they have been subirrigating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not subirrigate?
could you not subirrigate?
could he not subirrigate?
could we not subirrigate?
could you not subirrigate?
could they not subirrigate? 	could I not be subirrigating?
could you not be subirrigating?
could he not be subirrigating?
could we not be subirrigating?
could you not be subirrigating?
could they not be subirrigating? 	could I not have subirrigated?
could you not have subirrigated?
could he not have subirrigated?
could we not have subirrigated?
could you not have subirrigated?
could they not have subirrigated? 	could I not have been subirrigating?
could you not have been subirrigating?
could he not have been subirrigating?
could we not have been subirrigating?
could you not have been subirrigating?
could they not have been subirrigating?