English verb conjugation
COULD REFORMULATE

Regular verb: reformulate - reformulated - reformulated

Affirmation

Simple form	V-ing form
I could reformulate you could reformulate he could reformulate we could reformulate you could reformulate they could reformulate	I could be reformulating you could be reformulating he could be reformulating we could be reformulating you could be reformulating they could be reformulating
Perfect	V-ing perfect
I could have reformulated you could have reformulated he could have reformulated we could have reformulated you could have reformulated they could have reformulated	I could have been reformulating you could have been reformulating he could have been reformulating we could have been reformulating you could have been reformulating they could have been reformulating

Negation

Simple form	V-ing form
I couldn't reformulate you couldn't reformulate he couldn't reformulate we couldn't reformulate you couldn't reformulate they couldn't reformulate	I couldn't be reformulating you couldn't be reformulating he couldn't be reformulating we couldn't be reformulating you couldn't be reformulating they couldn't be reformulating
Perfect	V-ing perfect
I couldn't have reformulated you couldn't have reformulated he couldn't have reformulated we couldn't have reformulated you couldn't have reformulated they couldn't have reformulated	I couldn't have been reformulating you couldn't have been reformulating he couldn't have been reformulating we couldn't have been reformulating you couldn't have been reformulating they couldn't have been reformulating

Interrogative form

Simple form	V-ing form
could I reformulate? could you reformulate? could he reformulate? could we reformulate? could you reformulate? could they reformulate?	could I be reformulating? could you be reformulating? could he be reformulating? could we be reformulating? could you be reformulating? could they be reformulating?
Perfect	V-ing perfect
could I have reformulated? could you have reformulated? could he have reformulated? could we have reformulated? could you have reformulated? could they have reformulated?	could I have been reformulating? could you have been reformulating? could he have been reformulating? could we have been reformulating? could you have been reformulating? could they have been reformulating?

Interro-negative form

Simple form	V-ing form
couldn't I reformulate? couldn't you reformulate? couldn't he reformulate? couldn't we reformulate? couldn't you reformulate? couldn't they reformulate?	couldn't I be reformulating? couldn't you be reformulating? couldn't he be reformulating? couldn't we be reformulating? couldn't you be reformulating? couldn't they be reformulating?
Perfect	V-ing perfect
couldn't I have reformulated? couldn't you have reformulated? couldn't he have reformulated? couldn't we have reformulated? couldn't you have reformulated? couldn't they have reformulated?	couldn't I have been reformulating? couldn't you have been reformulating? couldn't he have been reformulating? couldn't we have been reformulating? couldn't you have been reformulating? couldn't they have been reformulating?