could reformulate
Regular verb: reformulate - reformulated- reformulated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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	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 	Perfect 	V-ing perfect 	
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	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 	Perfect 	V-ing perfect 	
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? 	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 	Perfect 	V-ing perfect 	
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? 	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?