could patent
Verbo regular: patent - patented- patented

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could patent
you could patent
he could patent
we could patent
you could patent
they could patent 	I could be patenting
you could be patenting
he could be patenting
we could be patenting
you could be patenting
they could be patenting	I could have patented
you could have patented
he could have patented
we could have patented
you could have patented
they could have patented	I could have been patenting
you could have been patenting
he could have been patenting
we could have been patenting
you could have been patenting
they could have been patenting	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not patent
you could not patent
he could not patent
we could not patent
you could not patent
they could not patent 	I could not be patenting
you could not be patenting
he could not be patenting
we could not be patenting
you could not be patenting
they could not be patenting	I could not have patented
you could not have patented
he could not have patented
we could not have patented
you could not have patented
they could not have patented	I could not have been patenting
you could not have been patenting
he could not have been patenting
we could not have been patenting
you could not have been patenting
they could not have been patenting	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I patent?
could you patent?
could he patent?
could we patent?
could you patent?
could they patent? 	could I be patenting?
could you be patenting?
could he be patenting?
could we be patenting?
could you be patenting?
could they be patenting? 	could I have patented?
could you have patented?
could he have patented?
could we have patented?
could you have patented?
could they have patented? 	could I have been patenting?
could you have been patenting?
could he have been patenting?
could we have been patenting?
could you have been patenting?
could they have been patenting? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not patent?
could you not patent?
could he not patent?
could we not patent?
could you not patent?
could they not patent? 	could I not be patenting?
could you not be patenting?
could he not be patenting?
could we not be patenting?
could you not be patenting?
could they not be patenting? 	could I not have patented?
could you not have patented?
could he not have patented?
could we not have patented?
could you not have patented?
could they not have patented? 	could I not have been patenting?
could you not have been patenting?
could he not have been patenting?
could we not have been patenting?
could you not have been patenting?
could they not have been patenting?