could constitute
Regular verb: constitute - constituted- constituted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could constitute
you could constitute
she could constitute
we could constitute
you could constitute
they could constitute 	I could be constituting
you could be constituting
she could be constituting
we could be constituting
you could be constituting
they could be constituting	I could have constituted
you could have constituted
she could have constituted
we could have constituted
you could have constituted
they could have constituted	I could have been constituting
you could have been constituting
she could have been constituting
we could have been constituting
you could have been constituting
they could have been constituting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't constitute
you couldn't constitute
she couldn't constitute
we couldn't constitute
you couldn't constitute
they couldn't constitute 	I couldn't be constituting
you couldn't be constituting
she couldn't be constituting
we couldn't be constituting
you couldn't be constituting
they couldn't be constituting	I couldn't have constituted
you couldn't have constituted
she couldn't have constituted
we couldn't have constituted
you couldn't have constituted
they couldn't have constituted	I couldn't have been constituting
you couldn't have been constituting
she couldn't have been constituting
we couldn't have been constituting
you couldn't have been constituting
they couldn't have been constituting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I constitute?
could you constitute?
could she constitute?
could we constitute?
could you constitute?
could they constitute? 	could I be constituting?
could you be constituting?
could she be constituting?
could we be constituting?
could you be constituting?
could they be constituting? 	could I have constituted?
could you have constituted?
could she have constituted?
could we have constituted?
could you have constituted?
could they have constituted? 	could I have been constituting?
could you have been constituting?
could she have been constituting?
could we have been constituting?
could you have been constituting?
could they have been constituting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I constitute?
couldn't you constitute?
couldn't she constitute?
couldn't we constitute?
couldn't you constitute?
couldn't they constitute? 	couldn't I be constituting?
couldn't you be constituting?
couldn't she be constituting?
couldn't we be constituting?
couldn't you be constituting?
couldn't they be constituting? 	couldn't I have constituted?
couldn't you have constituted?
couldn't she have constituted?
couldn't we have constituted?
couldn't you have constituted?
couldn't they have constituted? 	couldn't I have been constituting?
couldn't you have been constituting?
couldn't she have been constituting?
couldn't we have been constituting?
couldn't you have been constituting?
couldn't they have been constituting?