could formulate
Verbo regular: formulate - formulated- formulated

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could formulate
you could formulate
she could formulate
we could formulate
you could formulate
they could formulate 	I could be formulating
you could be formulating
she could be formulating
we could be formulating
you could be formulating
they could be formulating	I could have formulated
you could have formulated
she could have formulated
we could have formulated
you could have formulated
they could have formulated	I could have been formulating
you could have been formulating
she could have been formulating
we could have been formulating
you could have been formulating
they could have been formulating	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not formulate
you could not formulate
she could not formulate
we could not formulate
you could not formulate
they could not formulate 	I could not be formulating
you could not be formulating
she could not be formulating
we could not be formulating
you could not be formulating
they could not be formulating	I could not have formulated
you could not have formulated
she could not have formulated
we could not have formulated
you could not have formulated
they could not have formulated	I could not have been formulating
you could not have been formulating
she could not have been formulating
we could not have been formulating
you could not have been formulating
they could not have been formulating	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I formulate?
could you formulate?
could she formulate?
could we formulate?
could you formulate?
could they formulate? 	could I be formulating?
could you be formulating?
could she be formulating?
could we be formulating?
could you be formulating?
could they be formulating? 	could I have formulated?
could you have formulated?
could she have formulated?
could we have formulated?
could you have formulated?
could they have formulated? 	could I have been formulating?
could you have been formulating?
could she have been formulating?
could we have been formulating?
could you have been formulating?
could they have been formulating? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not formulate?
could you not formulate?
could she not formulate?
could we not formulate?
could you not formulate?
could they not formulate? 	could I not be formulating?
could you not be formulating?
could she not be formulating?
could we not be formulating?
could you not be formulating?
could they not be formulating? 	could I not have formulated?
could you not have formulated?
could she not have formulated?
could we not have formulated?
could you not have formulated?
could they not have formulated? 	could I not have been formulating?
could you not have been formulating?
could she not have been formulating?
could we not have been formulating?
could you not have been formulating?
could they not have been formulating?