could patent
Verbo regular: patent - patented- patented

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com 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	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I couldn't patent
you couldn't patent
he couldn't patent
we couldn't patent
you couldn't patent
they couldn't patent 	I couldn't be patenting
you couldn't be patenting
he couldn't be patenting
we couldn't be patenting
you couldn't be patenting
they couldn't be patenting	I couldn't have patented
you couldn't have patented
he couldn't have patented
we couldn't have patented
you couldn't have patented
they couldn't have patented	I couldn't have been patenting
you couldn't have been patenting
he couldn't have been patenting
we couldn't have been patenting
you couldn't have been patenting
they couldn't have been patenting	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com 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-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
couldn't I patent?
couldn't you patent?
couldn't he patent?
couldn't we patent?
couldn't you patent?
couldn't they patent? 	couldn't I be patenting?
couldn't you be patenting?
couldn't he be patenting?
couldn't we be patenting?
couldn't you be patenting?
couldn't they be patenting? 	couldn't I have patented?
couldn't you have patented?
couldn't he have patented?
couldn't we have patented?
couldn't you have patented?
couldn't they have patented? 	couldn't I have been patenting?
couldn't you have been patenting?
couldn't he have been patenting?
couldn't we have been patenting?
couldn't you have been patenting?
couldn't they have been patenting?