could invoke
Verbo regular: invoke - invoked- invoked

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con 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	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't invoke
you couldn't invoke
he couldn't invoke
we couldn't invoke
you couldn't invoke
they couldn't invoke 	I couldn't be invoking
you couldn't be invoking
he couldn't be invoking
we couldn't be invoking
you couldn't be invoking
they couldn't be invoking	I couldn't have invoked
you couldn't have invoked
he couldn't have invoked
we couldn't have invoked
you couldn't have invoked
they couldn't have invoked	I couldn't have been invoking
you couldn't have been invoking
he couldn't have been invoking
we couldn't have been invoking
you couldn't have been invoking
they couldn't have been invoking	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con 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-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I invoke?
couldn't you invoke?
couldn't he invoke?
couldn't we invoke?
couldn't you invoke?
couldn't they invoke? 	couldn't I be invoking?
couldn't you be invoking?
couldn't he be invoking?
couldn't we be invoking?
couldn't you be invoking?
couldn't they be invoking? 	couldn't I have invoked?
couldn't you have invoked?
couldn't he have invoked?
couldn't we have invoked?
couldn't you have invoked?
couldn't they have invoked? 	couldn't I have been invoking?
couldn't you have been invoking?
couldn't he have been invoking?
couldn't we have been invoking?
couldn't you have been invoking?
couldn't they have been invoking?