could stultify
Regular verb: stultify - stultified- stultified

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could stultify
you could stultify
she could stultify
we could stultify
you could stultify
they could stultify 	I could be stultifying
you could be stultifying
she could be stultifying
we could be stultifying
you could be stultifying
they could be stultifying	I could have stultified
you could have stultified
she could have stultified
we could have stultified
you could have stultified
they could have stultified	I could have been stultifying
you could have been stultifying
she could have been stultifying
we could have been stultifying
you could have been stultifying
they could have been stultifying	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't stultify
you couldn't stultify
she couldn't stultify
we couldn't stultify
you couldn't stultify
they couldn't stultify 	I couldn't be stultifying
you couldn't be stultifying
she couldn't be stultifying
we couldn't be stultifying
you couldn't be stultifying
they couldn't be stultifying	I couldn't have stultified
you couldn't have stultified
she couldn't have stultified
we couldn't have stultified
you couldn't have stultified
they couldn't have stultified	I couldn't have been stultifying
you couldn't have been stultifying
she couldn't have been stultifying
we couldn't have been stultifying
you couldn't have been stultifying
they couldn't have been stultifying	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I stultify?
could you stultify?
could she stultify?
could we stultify?
could you stultify?
could they stultify? 	could I be stultifying?
could you be stultifying?
could she be stultifying?
could we be stultifying?
could you be stultifying?
could they be stultifying? 	could I have stultified?
could you have stultified?
could she have stultified?
could we have stultified?
could you have stultified?
could they have stultified? 	could I have been stultifying?
could you have been stultifying?
could she have been stultifying?
could we have been stultifying?
could you have been stultifying?
could they have been stultifying? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I stultify?
couldn't you stultify?
couldn't she stultify?
couldn't we stultify?
couldn't you stultify?
couldn't they stultify? 	couldn't I be stultifying?
couldn't you be stultifying?
couldn't she be stultifying?
couldn't we be stultifying?
couldn't you be stultifying?
couldn't they be stultifying? 	couldn't I have stultified?
couldn't you have stultified?
couldn't she have stultified?
couldn't we have stultified?
couldn't you have stultified?
couldn't they have stultified? 	couldn't I have been stultifying?
couldn't you have been stultifying?
couldn't she have been stultifying?
couldn't we have been stultifying?
couldn't you have been stultifying?
couldn't they have been stultifying?