could empoison
Regular verb: empoison - empoisoned- empoisoned

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could empoison
you could empoison
he could empoison
we could empoison
you could empoison
they could empoison 	I could be empoisoning
you could be empoisoning
he could be empoisoning
we could be empoisoning
you could be empoisoning
they could be empoisoning	I could have empoisoned
you could have empoisoned
he could have empoisoned
we could have empoisoned
you could have empoisoned
they could have empoisoned	I could have been empoisoning
you could have been empoisoning
he could have been empoisoning
we could have been empoisoning
you could have been empoisoning
they could have been empoisoning	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not empoison
you could not empoison
he could not empoison
we could not empoison
you could not empoison
they could not empoison 	I could not be empoisoning
you could not be empoisoning
he could not be empoisoning
we could not be empoisoning
you could not be empoisoning
they could not be empoisoning	I could not have empoisoned
you could not have empoisoned
he could not have empoisoned
we could not have empoisoned
you could not have empoisoned
they could not have empoisoned	I could not have been empoisoning
you could not have been empoisoning
he could not have been empoisoning
we could not have been empoisoning
you could not have been empoisoning
they could not have been empoisoning	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I empoison?
could you empoison?
could he empoison?
could we empoison?
could you empoison?
could they empoison? 	could I be empoisoning?
could you be empoisoning?
could he be empoisoning?
could we be empoisoning?
could you be empoisoning?
could they be empoisoning? 	could I have empoisoned?
could you have empoisoned?
could he have empoisoned?
could we have empoisoned?
could you have empoisoned?
could they have empoisoned? 	could I have been empoisoning?
could you have been empoisoning?
could he have been empoisoning?
could we have been empoisoning?
could you have been empoisoning?
could they have been empoisoning? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not empoison?
could you not empoison?
could he not empoison?
could we not empoison?
could you not empoison?
could they not empoison? 	could I not be empoisoning?
could you not be empoisoning?
could he not be empoisoning?
could we not be empoisoning?
could you not be empoisoning?
could they not be empoisoning? 	could I not have empoisoned?
could you not have empoisoned?
could he not have empoisoned?
could we not have empoisoned?
could you not have empoisoned?
could they not have empoisoned? 	could I not have been empoisoning?
could you not have been empoisoning?
could he not have been empoisoning?
could we not have been empoisoning?
could you not have been empoisoning?
could they not have been empoisoning?