could preformulate
Verbo regular: preformulate - preformulated- preformulated

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could preformulate
you could preformulate
she could preformulate
we could preformulate
you could preformulate
they could preformulate 	I could be preformulating
you could be preformulating
she could be preformulating
we could be preformulating
you could be preformulating
they could be preformulating	I could have preformulated
you could have preformulated
she could have preformulated
we could have preformulated
you could have preformulated
they could have preformulated	I could have been preformulating
you could have been preformulating
she could have been preformulating
we could have been preformulating
you could have been preformulating
they could have been preformulating	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I couldn't preformulate
you couldn't preformulate
she couldn't preformulate
we couldn't preformulate
you couldn't preformulate
they couldn't preformulate 	I couldn't be preformulating
you couldn't be preformulating
she couldn't be preformulating
we couldn't be preformulating
you couldn't be preformulating
they couldn't be preformulating	I couldn't have preformulated
you couldn't have preformulated
she couldn't have preformulated
we couldn't have preformulated
you couldn't have preformulated
they couldn't have preformulated	I couldn't have been preformulating
you couldn't have been preformulating
she couldn't have been preformulating
we couldn't have been preformulating
you couldn't have been preformulating
they couldn't have been preformulating	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I preformulate?
could you preformulate?
could she preformulate?
could we preformulate?
could you preformulate?
could they preformulate? 	could I be preformulating?
could you be preformulating?
could she be preformulating?
could we be preformulating?
could you be preformulating?
could they be preformulating? 	could I have preformulated?
could you have preformulated?
could she have preformulated?
could we have preformulated?
could you have preformulated?
could they have preformulated? 	could I have been preformulating?
could you have been preformulating?
could she have been preformulating?
could we have been preformulating?
could you have been preformulating?
could they have been preformulating? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
couldn't I preformulate?
couldn't you preformulate?
couldn't she preformulate?
couldn't we preformulate?
couldn't you preformulate?
couldn't they preformulate? 	couldn't I be preformulating?
couldn't you be preformulating?
couldn't she be preformulating?
couldn't we be preformulating?
couldn't you be preformulating?
couldn't they be preformulating? 	couldn't I have preformulated?
couldn't you have preformulated?
couldn't she have preformulated?
couldn't we have preformulated?
couldn't you have preformulated?
couldn't they have preformulated? 	couldn't I have been preformulating?
couldn't you have been preformulating?
couldn't she have been preformulating?
couldn't we have been preformulating?
couldn't you have been preformulating?
couldn't they have been preformulating?