could invoke
Verbo regular: invoke - invoked- invoked

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could invoke
you could invoke
he could invoke
we could invoke
you could invoke
they could invoke 	I could be invoking
you could be invoking
he could be invoking
we could be invoking
you could be invoking
they could be invoking	I could have invoked
you could have invoked
he could have invoked
we could have invoked
you could have invoked
they could have invoked	I could have been invoking
you could have been invoking
he could have been invoking
we could have been invoking
you could have been invoking
they could have been invoking	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not invoke
you could not invoke
he could not invoke
we could not invoke
you could not invoke
they could not invoke 	I could not be invoking
you could not be invoking
he could not be invoking
we could not be invoking
you could not be invoking
they could not be invoking	I could not have invoked
you could not have invoked
he could not have invoked
we could not have invoked
you could not have invoked
they could not have invoked	I could not have been invoking
you could not have been invoking
he could not have been invoking
we could not have been invoking
you could not have been invoking
they could not have been invoking	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I invoke?
could you invoke?
could he invoke?
could we invoke?
could you invoke?
could they invoke? 	could I be invoking?
could you be invoking?
could he be invoking?
could we be invoking?
could you be invoking?
could they be invoking? 	could I have invoked?
could you have invoked?
could he have invoked?
could we have invoked?
could you have invoked?
could they have invoked? 	could I have been invoking?
could you have been invoking?
could he have been invoking?
could we have been invoking?
could you have been invoking?
could they have been invoking? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not invoke?
could you not invoke?
could he not invoke?
could we not invoke?
could you not invoke?
could they not invoke? 	could I not be invoking?
could you not be invoking?
could he not be invoking?
could we not be invoking?
could you not be invoking?
could they not be invoking? 	could I not have invoked?
could you not have invoked?
could he not have invoked?
could we not have invoked?
could you not have invoked?
could they not have invoked? 	could I not have been invoking?
could you not have been invoking?
could he not have been invoking?
could we not have been invoking?
could you not have been invoking?
could they not have been invoking?