can subvene
Regular verb: subvene - subvened- subvened

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can subvene
you can subvene
he can subvene
we can subvene
you can subvene
they can subvene 	I can be subvening
you can be subvening
he can be subvening
we can be subvening
you can be subvening
they can be subvening	I can have subvened
you can have subvened
he can have subvened
we can have subvened
you can have subvened
they can have subvened	I can have been subvening
you can have been subvening
he can have been subvening
we can have been subvening
you can have been subvening
they can have been subvening	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot subvene
you cannot subvene
he cannot subvene
we cannot subvene
you cannot subvene
they cannot subvene 	I cannot be subvening
you cannot be subvening
he cannot be subvening
we cannot be subvening
you cannot be subvening
they cannot be subvening	I cannot have subvened
you cannot have subvened
he cannot have subvened
we cannot have subvened
you cannot have subvened
they cannot have subvened	I cannot have been subvening
you cannot have been subvening
he cannot have been subvening
we cannot have been subvening
you cannot have been subvening
they cannot have been subvening	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I subvene?
can you subvene?
can he subvene?
can we subvene?
can you subvene?
can they subvene? 	can I be subvening?
can you be subvening?
can he be subvening?
can we be subvening?
can you be subvening?
can they be subvening? 	can I have subvened?
can you have subvened?
can he have subvened?
can we have subvened?
can you have subvened?
can they have subvened? 	can I have been subvening?
can you have been subvening?
can he have been subvening?
can we have been subvening?
can you have been subvening?
can they have been subvening? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not subvene?
can you not subvene?
can he not subvene?
can we not subvene?
can you not subvene?
can they not subvene? 	can I not be subvening?
can you not be subvening?
can he not be subvening?
can we not be subvening?
can you not be subvening?
can they not be subvening? 	can I not have subvened?
can you not have subvened?
can he not have subvened?
can we not have subvened?
can you not have subvened?
can they not have subvened? 	can I not have been subvening?
can you not have been subvening?
can he not have been subvening?
can we not have been subvening?
can you not have been subvening?
can they not have been subvening?