English verb conjugation
COULD ARTICULATE

Regular verb: articulate - articulated - articulated

Affirmation

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