could adulterate
Regular verb: adulterate - adulterated- adulterated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could adulterate
you could adulterate
she could adulterate
we could adulterate
you could adulterate
they could adulterate 	I could be adulterating
you could be adulterating
she could be adulterating
we could be adulterating
you could be adulterating
they could be adulterating	I could have adulterated
you could have adulterated
she could have adulterated
we could have adulterated
you could have adulterated
they could have adulterated	I could have been adulterating
you could have been adulterating
she could have been adulterating
we could have been adulterating
you could have been adulterating
they could have been adulterating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not adulterate
you could not adulterate
she could not adulterate
we could not adulterate
you could not adulterate
they could not adulterate 	I could not be adulterating
you could not be adulterating
she could not be adulterating
we could not be adulterating
you could not be adulterating
they could not be adulterating	I could not have adulterated
you could not have adulterated
she could not have adulterated
we could not have adulterated
you could not have adulterated
they could not have adulterated	I could not have been adulterating
you could not have been adulterating
she could not have been adulterating
we could not have been adulterating
you could not have been adulterating
they could not have been adulterating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I adulterate?
could you adulterate?
could she adulterate?
could we adulterate?
could you adulterate?
could they adulterate? 	could I be adulterating?
could you be adulterating?
could she be adulterating?
could we be adulterating?
could you be adulterating?
could they be adulterating? 	could I have adulterated?
could you have adulterated?
could she have adulterated?
could we have adulterated?
could you have adulterated?
could they have adulterated? 	could I have been adulterating?
could you have been adulterating?
could she have been adulterating?
could we have been adulterating?
could you have been adulterating?
could they have been adulterating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not adulterate?
could you not adulterate?
could she not adulterate?
could we not adulterate?
could you not adulterate?
could they not adulterate? 	could I not be adulterating?
could you not be adulterating?
could she not be adulterating?
could we not be adulterating?
could you not be adulterating?
could they not be adulterating? 	could I not have adulterated?
could you not have adulterated?
could she not have adulterated?
could we not have adulterated?
could you not have adulterated?
could they not have adulterated? 	could I not have been adulterating?
could you not have been adulterating?
could she not have been adulterating?
could we not have been adulterating?
could you not have been adulterating?
could they not have been adulterating?