could articulate
Regular verb: articulate - articulated- articulated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could articulate
you could articulate
she could articulate
we could articulate
you could articulate
they could articulate 	I could be articulating
you could be articulating
she could be articulating
we could be articulating
you could be articulating
they could be articulating	I could have articulated
you could have articulated
she could have articulated
we could have articulated
you could have articulated
they could have articulated	I could have been articulating
you could have been articulating
she could have been articulating
we could have been articulating
you could have been articulating
they could have been articulating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't articulate
you couldn't articulate
she couldn't articulate
we couldn't articulate
you couldn't articulate
they couldn't articulate 	I couldn't be articulating
you couldn't be articulating
she couldn't be articulating
we couldn't be articulating
you couldn't be articulating
they couldn't be articulating	I couldn't have articulated
you couldn't have articulated
she couldn't have articulated
we couldn't have articulated
you couldn't have articulated
they couldn't have articulated	I couldn't have been articulating
you couldn't have been articulating
she couldn't have been articulating
we couldn't have been articulating
you couldn't have been articulating
they couldn't have been articulating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I articulate?
could you articulate?
could she articulate?
could we articulate?
could you articulate?
could they articulate? 	could I be articulating?
could you be articulating?
could she be articulating?
could we be articulating?
could you be articulating?
could they be articulating? 	could I have articulated?
could you have articulated?
could she have articulated?
could we have articulated?
could you have articulated?
could they have articulated? 	could I have been articulating?
could you have been articulating?
could she have been articulating?
could we have been articulating?
could you have been articulating?
could they have been articulating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I articulate?
couldn't you articulate?
couldn't she articulate?
couldn't we articulate?
couldn't you articulate?
couldn't they articulate? 	couldn't I be articulating?
couldn't you be articulating?
couldn't she be articulating?
couldn't we be articulating?
couldn't you be articulating?
couldn't they be articulating? 	couldn't I have articulated?
couldn't you have articulated?
couldn't she have articulated?
couldn't we have articulated?
couldn't you have articulated?
couldn't they have articulated? 	couldn't I have been articulating?
couldn't you have been articulating?
couldn't she have been articulating?
couldn't we have been articulating?
couldn't you have been articulating?
couldn't they have been articulating?